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Microsoft shipped its largest Patch Tuesday on record today, and two of the fixes close holes that attackers are already exploiting. The release covers 622 of Microsoft's own CVEs by its Security Update Guide count, more than triple June's previous high of around 200
Microsoft has released the Windows 10 KB5099539 extended security update, which includes this month's record-breaking July 2026 Patch Tuesday fixes, along with additional security improvements. [...]
Microsoft has fixed a known issue causing the June 2026 security updates to fail on Windows Server 2016 systems that weren't up to date. [...]
Microsoft has resolved a known issue causing some Windows Server 2025 devices to boot into BitLocker recovery after installing the April 2026 security update. [...]
Microsoft has released the Windows 10 KB5094127 extended security update, which fixes the June 2026 Patch Tuesday vulnerabilities and adds new functionality to monitor the rollout of updated Secure Boot certificates that replace those expiring this month. [...]
Microsoft has resolved a known issue causing installation failures and 0x800f0922 errors when deploying the May 2026 Windows 11 security update (KB5089549). [...]
May security update trips over hostnames of a very specific length
May security update trips over hostnames of a very specific length
Microsoft has confirmed a new known issue affecting Windows Server 2016 systems that causes domain controller lookups to fail after installing the KB5087537 May 2026 security update. [...]
Microsoft has confirmed that the May 2026 Windows 11 security update (KB5089549) fails to install on some systems and triggers 0x800f0922 errors. [...]
Microsoft has patched 120 vulnerabilities in this month’s security update round
Microsoft has released the Windows 10 KB5087544 extended security update to fix the May 2026 Patch Tuesday vulnerabilities and resolve an issue with the new Remote Desktop warnings. [...]
The April 2026 KB5083769 security update breaks third-party backup applications from multiple vendors on systems running Windows 11 24H2 and 25H2. [...]
Microsoft is investigating an issue causing this month's KB5082063 security update to fail to install on some Windows Server 2025 systems. [...]
Microsoft confirmed on Tuesday that some Windows Server 2025 devices will boot into BitLocker recovery after installing the April 2026 KB5082063 Windows security update. [...]
Microsoft has released the Windows 10 KB5082200 extended security update to fix the April 2026 Patch Tuesday vulnerabilities, including 2 zero-days. [...]
Microsoft has released the Windows 10 KB5078885 extended security update to fix the March 2026 Patch Tuesday vulnerabilities, including 2 zero-days and an issue that prevent some devices from shutting down. [...]
Microsoft will turn on hotpatch security updates by default for all eligible Windows devices managed through Microsoft Intune and the Microsoft Graph API, beginning with the May 2026 Windows security update. [...]
Microsoft has released the Windows 10 KB5075912 extended security update to fix February 2026 Patch Tuesday vulnerabilities, including six zero-days, and continue rolling out replacements for expiring Secure Boot certificates. [...]
Microsoft has linked recent reports of Windows 11 boot failures after installing the January 2026 updates to previously failed attempts to install the December 2025 security update, which left systems in an "improper state." [...]