Forbes describes it as "definitely already out there, and under active exploitation according to the U.S. Cybersecurity and Infrastructure Security Agency, urging all organizations to prioritize timely remediation as the attack vector poses a significant risk."

"We have issued CVE-2026-42897 to address a spoofing vulnerability affecting Exchange Outlook Web Access (OWA)," Microsoft told SecurityWeek. "We recommend customers enable EEMS to be better protected, and to follow our guidance available here." Microsoft this week patched 137 vulnerabilities with its Patch Tuesday updates and the cybersecurity industry was surprised to see that the latest updates did not address any zero-days. However, a zero-day was disclosed just 48 hours later, on May 14... described as a spoofing and XSS issue affecting Exchange Server Subscription Edition, 2016, and 2019. "Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network," Microsoft said in its advisory.

The company noted that the vulnerability affects Exchange Outlook Web Access (OWA) and an attacker can exploit it by sending a specially crafted email to the targeted user. "If the user opens the email in Outlook Web Access and certain interaction conditions are met, arbitrary JavaScript can be executed in the browser context," Microsoft explained.
CSO Online shares more details. "Admins should note there are known issues once the mitigation is applied either manually or automatically through the EM Service." - OWA Print Calendar functionality might not work. As a workaround, copy the data or screenshot the calendar you want to print, or use Outlook Desktop client.

- Inline images might not display correctly in the recipient's OWA reading pane. As a workaround, send images as email attachments or use Outlook Desktop client...

- Admins may get a message saying "Mitigation invalid for this Exchange version." in mitigation details. This issue is cosmetic and the mitigation does apply successfully if the status is shown as "Applied". Microsoft is investigating how to address this glitch.
Forbes notes "It's been something of a rough few days for Microsoft Exchange on the security vulnerability front," since this week also saw a zero-day demonstrated at the Pwn2Own Berlin hacking event, "which has been responsibly disclosed and not released into the wild." The Berlin event got off to a flying start on May 14 as Windows 11 was hit by no less than three zero-day exploits. On day two, hacking teams were no less successful, chaining together three new vulnerabilities in Microsoft Exchange in order to achieve the holy grail of SYSTEM-level remote code execution. Such was the level of this achievement that Orange Tsai from the DEVCORE Research Team was rewarded with a $200,000 bounty payment in return for immediately handing over all the technical details to the event organizers.
"This is, in fact, good news," Forbes writes, since "full details of the vulnerabilities underlying the exploits, along with the technical nature of the exploit code itself, will be handed over to Microsoft, which will then have 90 days to provide a fix before any details are made public."

"The vulnerability is simple in practice," writes Tom's Hardware: "run a command as a standard user and gain root (administrator) access to the machine." And it was Mythos Preview that helped the security researchers at Palo Alto-based Calif bypass a five-year Apple security effort in just five days. The blog 9to5Mac reports: Last year, Apple introduced Memory Integrity Enforcement (MIE), a hardware-assisted memory safety system designed to make memory corruption exploits much harder to execute... [The researchers note it's built into Apple all models of the iPhone 17 and iPhone Air, and some MacBooks] They explain they have a 55-page technical report on the hack, but they won't release it until Apple ships a fix for the exploit. But they do note in broad terms that Anthropic's Mythos Preview model helped them identify the bugs and assisted them throughout the entire collaborative exploit development process.

"Mythos Preview is powerful: once it has learned how to attack a class of problems, it generalizes to nearly any problem in that class. Mythos discovered the bugs quickly because they belong to known bug classes. But MIE is a new best-in-class mitigation, so autonomously bypassing it can be tricky. This is where human expertise comes in. Part of our motivation was to test what's possible when the best models are paired with experts. Landing a kernel memory corruption exploit against the best protections in a week is noteworthy, and says something strong about this pairing...."

[I]n a time when even small teams, with the help of AI, can make discoveries such as this one, "we're about to learn how the best mitigation technology on Earth holds up during the first AI bugmageddon."

The Linux 7.1 kernel has added new documentation clarifying what qualifies as a security bug and how AI-assisted vulnerability reports should be handled. Phoronix reports: Stemming from the recent influx of security bugs to the Linux kernel as well as an uptick in bug and security reports from discoveries made in full or in part with AI, additional documentation was warranted. Longtime Linux developer Willy Tarreau took to authoring the additional documentation around kernel bugs. To summarize (since the documentation is a bit too lengthy for a Slashdot story), the AI-assisted vulnerability reports should "be treated as public" because such findings "systematically surface simultaneously across multiple researchers, often on the same day." It adds that reporters should avoid posting a reproducer openly, instead "just mention that one is available" and provide it privately if maintainers request it. The guidance also tells AI-assisted reporters to keep submissions concise and plain-text, focus on verifiable impact rather than speculative consequences, include a thoroughly tested reproducer, and, where possible, propose and test a fix.

As for what qualifies as a security bug, the documentation says the private security list is for "urgent bugs that grant an attacker a capability they are not supposed to have on a correctly configured production system" and are easy to exploit, creating an imminent threat to many users. Reporters are told to consider whether the issue "actually crosses a trust boundary," since many bugs submitted privately are really ordinary defects that belong in the normal public reporting process.

All the new documentation can be read via this commit.

A Bitcoin holder reportedly recovered 5 BTC worth nearly $400,000 with the help of Anthropic's Claude. According to X user cprkrn, they changed their wallet password while "stoned" and forgot it, unable to regain access for more than 11 years. Tom's Hardware reports: After finding a mnemonic that actually turned out to be their old password a few weeks ago, the user dumped their entire college computer files in Claude in a last-gasp effort. The bot uncovered an old backup wallet file that it successfully decrypted, while also uncovering a bug in the password configuration that was preventing recovery up to that point.

[...] It seems that the user already had some candidate passwords and multiple wallets stored on their PC. They'd been trying to brute-force their way into the locked file with btcrecover, an open-source Bitcoin wallet recovery tool, but to no success. Their luck changed for the better when they found an old mnemonic seed phrase written in an old college notebook. The HD addresses recovered by the seed phrase matched those of a specific file on their computer, confirming that it was the wallet that held the 5 BTC, but it remained encrypted.

Out of frustration, cprkrn then dumped their whole college computer into Claude. This was when the AI discovered an older backup file of the wallet from December 2019 hidden in cprkrn's data. Claude also discovered an issue where the shared key and passwords that btcrecover was trying weren't combined properly. With the bug ironed out and an older wallet predating the password change, Claude successfully ran btcrecover and was able to decrypt the private keys, allowing cprkrn to transfer the five "lost" BTC to their current wallet.

An anonymous researcher known as Nightmare-Eclipse, who has already leaked several Windows zero-days this year, has disclosed two more: YellowKey and GreenPlasma. The Register reports: Nightmare-Eclipse described YellowKey as "one of the most insane discoveries I ever found." They provided the files, which have to be loaded onto a USB drive, and if the attacker completes the key sequence correctly, they are granted unrestricted shell access to a BitLocker-protected machine. When it comes to claims like these, we usually exercise some caution, as this bug requires physical access to a Windows PC. However, seeing that BitLocker acts as Windows' last line of defense for stolen devices, bypassing the technology grants thieves the ability to access encrypted files. Rik Ferguson, VP of security intelligence at Forescout, said: "If [the researcher's claim] holds up, a stolen laptop stops being a hardware problem and becomes a breach notification."

Despite the physical access requirement, Gavin Knapp, cyber threat intelligence principal lead at Bridewell, told The Register that YellowKey remains "a huge security problem for organizations using BitLocker." Citing information shared in cyber threat intelligence circles, he added that YellowKey can be mitigated by implementing a BitLocker PIN and a BIOS password lock. Nightmare-Eclipse hinted at YellowKey also acting as a backdoor, allegedly injected by Microsoft, although the people we spoke to said this was impossible to verify based on the information available. The researcher also published partial exploit code for GreenPlasma, rather than a fully formed proof of concept exploit (PoC).

Ferguson noted attackers need to take the code provided by the researcher and figure out how to weaponize it themselves, which is no small task: in its current state it triggers a UAC consent prompt in default Windows configurations, meaning a silent exploit remains a work in progress. Knapp warned that these kinds of privilege escalation flaws are often used by attackers after they gain an initial foothold in a victim's system. "These elevation of privilege vulnerabilities are often weaponized during post-exploitation to enable threat actors to discover and harvest credentials and data, before moving laterally to other systems, prior to end goals such as data theft and/or ransomware deployment," he said. "Currently, there is no known mitigation for GreenPlasma. It will be important to patch when Microsoft addresses the issue." The other zero-days leaked include RedSun, a Windows Defender privilege escalation flaw; UnDefend, a Windows Defender denial-of-service bug; and BlueHammer, a separate Microsoft vulnerability tracked as CVE-2026-32201 that was patched in April.

According to The Register, RedSun and UnDefend remained unfixed at the time of publication, and proof-of-concept code for the flaws was reportedly picked up quickly and abused in real-world attacks.

A new Linux local privilege escalation flaw called Fragnesia has been disclosed as a Dirty Frag-like vulnerability, allowing arbitrary byte writes into the kernel page cache of read-only files through a separate ESP/XFRM logic bug. Phoronix reports: Proof of concept code for Fragnesia is already out there. There is a two-line patch for addressing the issue within the Linux kernel's skbuff.c code. That patch hasn't yet been mainlined or picked up by any mainline kernel releases but presumably will be in short order for addressing this local privilege escalation issue. More details can be found here.

cURL creator Daniel Stenberg says Anthropic's hyped Mythos bug-hunting model found only one confirmed low-severity vulnerability in cURL, plus a few non-security bugs, after he expected a much longer list. He argues Mythos may be useful, but not meaningfully beyond other modern AI code-analysis tools. "My personal conclusion can however not end up with anything else than that the big hype around this model so far was primarily marketing," Stenberg said a blog post. "I see no evidence that this setup finds issues to any particular higher or more advanced degree than the other tools have done before Mythos." He went on to call Mythos "an amazingly successful marketing stunt for sure." The Register reports: Stenberg explained in a Monday blog post that he was promised access to Anthropic's Mythos model - sort of - through the AI biz's Project Glasswing program. Part of Glasswing involves giving high-profile open source projects access via the Linux Foundation, but while Stenberg signed up to try Mythos, he said he never actually received direct access to the model. Instead, someone else with access ran Mythos against curl's codebase and later sent him a report. "It's not that I would have a lot of time to explore lots of different prompts and doing deep dive adventures anyway," Stenberg explained. "Getting the tool to generate a first proper scan and analysis would be great, whoever did it."

That scan, which analyzed curl's git repository at a recent master-branch commit, was sent back to him earlier this month, and it found just five things that it claimed were "confirmed security vulnerabilities" in cURL. Saying he had expected an extensive list of vulnerabilities, Stenberg wrote that the report "felt like nothing," and that feeling was further validated by a review of Mythos' findings. "Once my curl security team fellows and I had poked on this short list for a number of hours and dug into the details, we had trimmed the list down and were left with one confirmed vulnerability," Stenberg said, bringing us back to the aforementioned number.

As for the other four, three turned out to be false positives that pointed out cURL shortcomings already noted in API documentation, while the team deemed the fourth to be just a simple bug. "The single confirmed vulnerability is going to end up a severity low CVE planned to get published in sync with our pending next curl release 8.21.0 in late June," the cURL meister noted. "The flaw is not going to make anyone grasp for breath."

mrspoonsi shares a report: Dirty Frag is a vulnerability class, first discovered and reported by Hyunwoo Kim (@v4bel), that can obtain root privileges on major Linux distributions by chaining the xfrm-ESP Page-Cache Write vulnerability and the RxRPC Page-Cache Write vulnerability. Dirty Frag extends the bug class to which Dirty Pipe and Copy Fail belong. Because it is a deterministic logic bug that does not depend on a timing window, no race condition is required, the kernel does not panic when the exploit fails, and the success rate is very high. Because the embargo has been broken, no patch or CVE currently exists. "As with the previous Copy Fail vulnerability, Dirty Frag likewise allows immediate root privilege escalation on all major distributions, and it chains two separate vulnerabilities," Kim said. Detailed technical information can be found here.

BleepingComputer notes that the two vulnerabilities chained by Dirty Frag are "now tracked under the following CVE IDs: the xfrm-ESP one was assigned CVE-2026-43284, and the RxRPC isye is now CVE-2026-43500."

joshuark shares a report from Linux Magazine: Microsoft has issued a warning that a vulnerability with a CVSS score of 7.8 has been found in the Linux kernel. The vulnerability in question is tagged CVE-2026-31431 and, according to the Cybersecurity and Infrastructure Security Agency (CISA), "This Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise."

The distributions affected are Ubuntu, Red Hat, SUSE, Debian, Fedora, Arch Linux, and Amazon Linux. This could also affect any distribution based on those in the list, which means pretty much every Linux distro that isn't independent. The flaw is found in the Linux kernel cryptographic subsystem's algif_aead module of AF_ALG. The problem is that a particular optimization has led to the kernel reusing the source memory as the destination during cryptographic operations. What this means is that attackers can take advantage of interactions between the AF_ALG socket interface and a splice() system call. Until patches are released, Microsoft is advising that the affected crypto feature should be disabled, or AF_ALG socket creation should be blocked. The vulnerability is also known as "Copy Fail," which has been shared on Slashdot and detailed in a technical report. The vulnerability affects almost every version of the Linux OS and is now being exploited in the wild. U.S. cybersecurity agency CISA has ordered all civilian federal agencies to patch any affected systems by May 15.

An anonymous reader quotes a report from TechCrunch: A severe security vulnerability affecting almost every version of the Linux operating system has caught defenders off-guard and scrambling to patch after security researchers publicly released exploit code that allows attackers to take complete control of vulnerable systems. The U.S. government says the bug, dubbed "CopyFail," is now being exploited in the wild, meaning it's being actively used in malicious hacking campaigns. [...] Given the risk to the federal enterprise network, U.S. cybersecurity agency CISA has ordered all civilian federal agencies to patch any affected systems by May 15.

Hackers are actively exploiting a critical cPanel and WHM vulnerability, tracked as CVE-2026-41940, that allows remote attackers to bypass the login screen and gain full administrative access to affected web servers. Major hosts including Namecheap, HostGator, and KnownHost have taken mitigation steps or patched systems, but cPanel is urging all customers and web hosts to update immediately because the software is widely used across millions of websites. TechCrunch reports: cPanel and WHM are two software suites used for managing web servers that host websites, manage emails, and handle important configurations and databases needed to maintain an internet domain. The two suites have deep-access to the servers that they manage, allowing a malicious hacker potentially unrestricted access to data managed by the affected software.

Given the ubiquity of the cPanel and WHM software across the web hosting industry, hackers could compromise potentially large numbers of websites that haven't patched the bug. Canada's national cybersecurity agency said in an advisory that the bug could be exploited to compromise websites on shared hosting servers, such as large web hosting companies.

The agency said that "exploitation is highly probable" and that immediate action from cPanel customers, or their web hosts, is necessary to prevent malicious access. [...] One web hosting company says it found evidence that hackers have been abusing the vulnerability for months before the attempts were discovered.

A newly disclosed Linux kernel flaw dubbed "Copy Fail" can let a local, unprivileged attacker gain root access on major Linux distributions, with researchers claiming the bug affects kernels shipped since 2017. "The POC exploit works out of the box today, but a future version that can escape from containers like Docker is promised soon," writes Slashdot reader tylerni7. "Technical details are available here." Slashdot reader BrianFagioli shares a report from NERDS.xyz: A newly disclosed Linux kernel vulnerability called Copy Fail (CVE-2026-31431) allows an unprivileged user to gain root access using a tiny 732-byte script, and it works with unsettling consistency across major distributions. Unlike older exploits that relied on race conditions or fragile timing, this one is a straight-line logic flaw in the kernel's crypto subsystem. It abuses AF_ALG sockets and splice to overwrite a few bytes in the page cache of a target file, such as /usr/bin/su. Because the kernel executes from the page cache, not directly from disk, the attacker can inject code into a setuid binary in memory and immediately escalate privileges.

What makes this especially concerning is how quiet it is. The file on disk remains unchanged, so standard integrity checks see nothing wrong, while the in-memory version has already been tampered with. The same primitive can also cross container boundaries since the page cache is shared, raising the stakes for multi-tenant environments and Kubernetes nodes. The underlying issue traces back to an in-place optimization added years ago, now being rolled back as part of the fix. Until patched kernels are widely deployed, this is one of those bugs that feels less like a theoretical risk and more like a practical, reliable path to full system compromise.

Sony is reportedly rolling out a 30-day online check-in requirement for some digital PS4 and PS5 games, meaning players could temporarily lose access if their console does not reconnect to renew the license. Tom's Hardware reports: In the info page of an affected game, you'd see a new validity period and a "remaining time" deadline. At first, this seemed like a software bug, but now PlayStation Support has confirmed its authenticity to multiple users. PlayStation owners are furious about the change.

From what we've seen, this DRM is intended for digital game copies. It works by instating a mandatory online check-in where you have to connect to the internet within a rolling 30-day window or risk losing access to the game. Afterward, you can still restore access, but you'll need an internet connection to renew the game's license first. So far, it seems like only games installed after the recent March firmware update are affected.

Affected customers report that setting your PS4 or PS5 as the primary console doesn't alleviate this check-in policy either. No matter what, any game you download from now on will feature this new requirement, effectively eliminating the concept of offline play for even single-player titles.

"Old code like amateur radio and NFC have long been a burden to core networking developers," reads the pull request.

And so Thursday Linus Torvald merged the pull request "to rid the Linux kernel of the old Integrated Services Digital Network (ISDN) subsystem," reports Phoronix, "and various other old network drivers largely for PCMCIA era network adapters." This was the code suggested for removal given the recent influx of AI/LLM-generated bug reports against this dated code that likely has no active upstream users remaining... [W]ith the large language models and increased code fuzzing finding potential issues with these drivers for obsolete hardware, it's easier to just get rid of these drivers if no one is actively using the hardware from decades ago... This merge lightens the kernel by 138,161 lines of code with ISDN gone and numerous old network adapters and also getting rid of legacy ATM device drivers as well as the amateur ham radio support. The main networking drivers removed affect the 3com 3c509 / 3c515 / 3c574 / 3c589, AMD Lance, AMD NMCLAN, SMSC SMC9194 / SMC91C92, Fujitsu FMVJ18X, and 8390 AX88190 / Ultra / WD80X3.

Linux 7.1 also has removed the long-obsolete bus mouse support as well as beginning to phase out Intel 486 CPU support and removing support for Russia's Baikal CPUs.

Apple has fixed a bug that could cause parts of Signal notifications to remain stored on iPhones even after messages disappeared and the app was deleted. "Affected users concerned about push notifications can update their devices to stop what Apple characterized as 'notifications marked for deletion' that 'could be unexpectedly retained on the device,'" reports Ars Technica. "According to Apple, the push notifications should never have been stored, but a 'logging issue' failed to redact data." From the report: Vulnerable users hoping to evade law enforcement surveillance often use encrypted apps like Signal to communicate sensitive information. That's why users felt blindsided when 404 Media reported that Apple was unexpectedly storing push notifications displaying parts of encrypted messages for up to a month. This occurred even after the message was set to disappear and the app itself was deleted from the device.

404 Media flagged the issue after speaking to multiple people who attended a hearing where the FBI testified that it "was able to forensically extract copies of incoming Signal messages from a defendant's iPhone, even after the app was deleted, because copies of the content were saved in the device's push notification database." The shocking revelation came in a case that 404 Media noted was "the first time authorities charged people for alleged 'Antifa' activities after President Trump designated the umbrella term a terrorist organization." "We're grateful to Apple for the quick action here, and for understanding and acting on the stakes of this kind of issue," Signal's post said. "It takes an ecosystem to preserve the fundamental human right to private communication."

In their post, Signal confirmed that after users update their devices, "no action is needed for this fix to protect Signal users on iOS. Once you install the patch, all inadvertently-preserved notifications will be deleted and no forthcoming notifications will be preserved for deleted applications."

BrianFagioli writes: Mozilla says it used an early version of Anthropic's Claude Mythos Preview to comb through Firefox's code, and the results were hard to ignore. In Firefox 150, the team fixed 271 vulnerabilities identified during this effort, a number that would have been unthinkable not long ago. Instead of relying only on fuzzing tools or human review, the AI was able to reason through code and surface issues that typically require highly specialized expertise.

The bigger implication is less about one release and more about where this is heading. Security has long favored attackers, since they only need to find a single flaw while defenders have to protect everything. If AI can scale vulnerability discovery for defenders, that dynamic could start to shift. It does not mean zero days disappear overnight, but it suggests a future where bugs are found and fixed faster than attackers can weaponize them. "Computers were completely incapable of doing this a few months ago, and now they excel at it," says Mozilla in a blog post. "We have many years of experience picking apart the work of the world's best security researchers, and Mythos Preview is every bit as capable. So far we've found no category or complexity of vulnerability that humans can find that this model can't."

The company concluded: "The defects are finite, and we are entering a world where we can finally find them all."

"Anthropic has unveiled Claude Mythos, a new AI model capable of discovering critical vulnerabilities at scale," writes Slashdot reader wiredmikey. "It's already powering Project Glasswing, a joint effort with major tech firms to secure critical software. But the same capabilities could also accelerate offensive cyber operations." SecurityWeek reports: Mythos is not an incremental improvement but a step change in performance over Anthropic's current range of frontier models: Haiku (smallest), Sonnet (middle ground), and Opus (most powerful). Mythos sits in a fourth tier named Copybara, and Anthropic describes it as superior to any other existing AI frontier model. It incorporates the current trend in the use of AI: the modern use of agentic AI. "The powerful cyber capabilities of Claude Mythos Preview are a result of its strong agentic coding and reasoning skills... the model has the highest scores of any model yet developed on a variety of software coding tasks," notes Anthropic in a blog titled Project Glasswing -- Securing critical software for the AI era.

In the last few weeks, Mythos Preview has identified thousands of zero-day vulnerabilities with many classified as critical. Several are ten or 20 years old -- the oldest found so far is a 27-years old bug in OpenBSD. Elsewhere, a 16-years old vulnerability found in video software has survived five million hits from other automated testing tools without ever being discovered. And it autonomously found and chained together several in the Linux kernel allowing an attacker to escalate from ordinary user access to complete control of the machine. [...] Anthropic is concerned that Mythos' capabilities could unleash cyberattacks too fast and too sophisticated for defenders to block. It hopes that Mythos can be used to improve cybersecurity generally before malicious actors can get access to it.

To this end, the firm has announced the next stage of this preparation as Project Glasswing, powered by Mythos Preview. Given the rate of AI progress, it will not be long before such capabilities proliferate, potentially beyond actors who are committed to deploying them safely. "Project Glasswing is a starting point. No one organization can solve these cybersecurity problems alone: frontier AI developers, other software companies, security researchers, open-source maintainers, and governments across the world all have essential roles to play." Claude Mythos Preview is described as a general-purpose, unreleased frontier model from Anthropic that has nevertheless completed its training phase. The firm does not plan to make Mythos Preview generally available. The implication is that 'Preview' is a term used solely to describe the current state of Mythos and the market's readiness to receive it, and will be dropped when the firm gets closer to general release.

The Internet Bug Bounty program "has been paused for new submissions," they announced last week.

Running since 2012, the program is funded by "a number of leading software companies," reports InfoWorld, "and has awarded more than $1.5m to researchers who have reported bugs " Up to now, 80% of its payouts have been for discoveries of new flaws, and 20% to support remediation efforts. But as artificial intelligence makes it easier to find bugs, that balance needs to change, HackerOne said in a statement. "AI-assisted research is expanding vulnerability discovery across the ecosystem, increasing both coverage and speed. The balance between findings and remediation capacity in open source has substantively shifted," said HackerOne.

Among the first programs to be affected is the Node.js project, a server-side JavaScript platform for web applications known for its extensive ecosystem. While the project team will continue to accept and triage bug reports through HackerOne, without funding from the Internet Bug Bounty program it will no longer pay out rewards, according to an announcement on its website...

[J]ust last month, Google also put a halt to AI-generated submissions provided to its Open Source Software Vulnerability Reward Program.
The Internet Bug Bounty stressed that "We have a responsibility to the community to ensure this program effectively accomplishes its ambitious dual purpose: discovery and remediation. Accordingly, we are pausing submissions while we consider the structure and incentives needed to further these goals..."

"We remain committed to strengthening open source security. Working with project maintainers and researchers, we're actively evaluating solutions to better align incentives with open source ecosystem realities and ensure vulnerability discoveries translate into durable remediation outcomes."

"Emergency out-of-band fixes issued by enterprise IT giants Microsoft and Oracle have shone a spotlight on issues around both update cycles and patching," reports Computer Weekly: Microsoft's emergency update, KB5085516, addresses an issue that arose after installing the mandatory cumulative updates pushed live on Patch Tuesday earlier this month. According to Microsoft, it has since emerged that many users experienced problems signing into applications with a Microsoft account, seeing a "no internet" error message even though the device had a working connection. This had the effect of preventing access to multiple services and applications. It should be noted that organisations using Entra ID did not experience the issue.

But Microsoft's emergency patch comes just days after it doubled down on a commitment to software quality, reliability and stability. In a blog post published just 24 hours prior to the latest update, Pavan Davuluri of Microsoft's Windows Insider Program Team said updates should be "predictable and easy to plan around".
Michael Bell, founder/CEO of Suzu Labs tells Computer Weekly that Microsoft's patch for the sign-in bug follows "separate hotpatches for RRAS remote code execution flaws and a Bluetooth visibility bug. Three emergency fixes in eight days does not shout reliability era." Oracle's patch, meanwhile, addresses CVE-2026-21992, a remote code execution flaw in the REST:WebServices component of Oracle Identity Manager and the Web Services Security component of Oracle Web Services Manager in Oracle Fusion Middleware. It carries a CVSS score of 9.8 and can be exploited by an unauthenticated attacker with network access over HTTP.

Longtime Slashdot reader UnknowingFool writes: Users of Samsung PCs are reporting the inability to access the C: drive after the Windows 11 February update. The bug seems to be in connection with the Samsung Galaxy Connect app, which allows Samsung phones and tablets to connect to Windows machines. [A previous stable version of the app has been re-released to prevent this problem from spreading.] This parody explains the situation with humor. The issue stems from update KB5077181 and is impacting Samsung PCs running Windows 11 25H2 or 24H2. Microsoft and Samsung have confirmed the issue and published a workaround, but as PCWorld notes, it will take some time. The workaround "requires removing the Samsung application, then asking Windows to repair the drive permissions and assigning a new owner, then restoring the Windows default permissions, including patching in some custom code that Microsoft wrote."