Patches Ancient Excel bug comes out of retirement for active attacks Vuln old enough to drive lands on CISA's exploited list While Microsoft was rolling out its bumper Patch Tuesday updates this week, US cybersecurity agency CISA was readying an alert about a 17-year-old critical Excel flaw now und… …
… However, Microsoft has not confirmed that bug yet. Microsoft Windows 11 Known issues Patch tuesday Windows bugs Windows 11 bugs Windows 11 issues Installation bug Installation error Registry fix Kb5089549 0x800f0922 Report a problem with this article
Updated on May 4th, 2026: According to Microsoft, the issue with security warnings when opening RDP files are due to a bug that's supposedly been fixed in update KB5083631. …
… For instance, in April 2025, Microsoft resolved another bug preventing enterprise customers from installing the April 2025 security updates via Windows Server Update Services WSUS . …
… The system, codenamed MDASH, found 16 security flaws in Windows before any attacker could get to them, including four critical remote code execution bugs that could have handed unauthenticated attackers a straight line into enterprise networks. …
… Security researcher Will Dormann of Tharros independently verified the results. A bug that was supposed to be fixed in 2020 The flaw sits in the Windows Cloud Filter driver, cldflt.sys, specifically in a routine called HsmOsBlockPlaceholderAccess. The bug is not new. …
On Windows 11 , the security update KB5083769 introduces a new behavior using the psmounterex.sys driver that causes third-party backup solutions to fail, and Microsoft recommends updating your backup software since this isn't a bug with the operating system. …
… He was quick to add, however, that using Mythos saved the company months of costly human effort to find a single bug, and the new AI model is every bit as capable as the world's best security researchers. …
… Windows 10 News Microsoft has confirmed that a shutdown bug affecting Windows 11 is also impacting supported Windows 10 builds, caused by January security updates. …
… The attackers were able to gain access thanks to an "unpatched" security bug on the website. …
