Knowledgebase Catalog

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KB# Last Updated Description
KB5126421 Sep 26, 2026 KB5126421 is a cumulative security and reliability update for .NET Framework 3.5 and 4.8.1 released on September 8, 2026. This patch applies to Windows 10 Version 21H2 and Version 22H2, addressing critical vulnerabilities in the .NET Framework runtime environment. The…
KB5124015 Sep 26, 2026 KB5124015 is a Safe OS Dynamic Update released on September 8, 2026, for Windows 11 versions 24H2 and 25H2. This update focuses on improvements to the Windows Recovery Environment (WinRE), which is a critical component for system recovery and troubleshooting.…
KB5120701 Sep 26, 2026 Released on August 11, 2026, KB5120701 is a cumulative security and reliability update for .NET Framework 3.5 and 4.8 targeting Windows 10 Version 21H2 and 22H2. This patch addresses six critical vulnerabilities including multiple elevation of privilege and remote code…
KB5122883 Sep 26, 2026 KB5122883 is a Safe OS Dynamic Update for Windows Server 2025 released on September 8, 2026. This update focuses on improvements to the Windows Recovery Environment (WinRE), which is a critical component for system recovery and troubleshooting. The update replaces…
KB5126056 Sep 26, 2026 KB5126056 is a Setup Dynamic Update released on September 8, 2026, addressing security vulnerabilities in Windows setup binaries and files used during feature updates. This patch applies to Windows 11 versions 24H2 and 25H2 across all editions. The update is…
KB5126149 Sep 26, 2026 KB5126149 is a cumulative security and quality update for .NET Framework 3.5, 4.8, and 4.8.1 released on September 8, 2026, for Windows Server 2022. This patch addresses two significant security vulnerabilities affecting the .NET Framework runtime environment. The update is…
KB5122880 Sep 26, 2026 KB5122880 is a cumulative security update for Windows 11 version 23H2 released on September 8, 2026 (OS Build 22621.7582). This update incorporates the latest security fixes and improvements, along with non-security updates from the previous month's optional preview release. It…
KB5126148 Sep 26, 2026 KB5126148 is a Security and Quality Rollup released on September 8, 2026, addressing critical vulnerabilities in .NET Framework versions 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, and 4.8 on Windows Server 2012 R2. This cumulative update includes both security fixes and reliability…
KB5126424 Sep 26, 2026 KB5126424 is a cumulative security and reliability update for .NET Framework 3.5 and 4.8.1 released on September 8, 2026, targeting Windows 11 version 23H2. This patch addresses two significant security vulnerabilities and includes quality improvements to enhance system stability. The…
KB5120238 Sep 26, 2026 KB5120238 is a security and quality rollup update released on August 11, 2026, for Windows Server 2019 (OS Build 17763.9121) and Windows 10 version 1809. This cumulative update addresses security vulnerabilities and system stability improvements for enterprise and legacy systems…
KB5123065 Sep 26, 2026 KB5123065 is a Monthly Rollup security update released on September 8, 2026, for Windows Server 2012 Extended Security Updates (ESU). This cumulative update addresses security vulnerabilities and includes quality improvements, with particular focus on Secure Boot certificate deployment and coverage…
KB5122887 Sep 26, 2026 KB5122887 is a Safe OS Dynamic Update released on September 8, 2026, designed for Windows 10 Enterprise LTSC 2021 and Windows 10 ESU editions. This update specifically targets improvements to the Windows Recovery Environment (WinRE), enhancing system recovery capabilities. The…
KB5126052 Sep 26, 2026 KB5126052 is a September 8, 2026 cumulative security update for .NET Framework 3.5 and 4.8.1 targeting Windows 11 versions 24H2 and 25H2, as well as Microsoft server operating systems running 24H2. The update addresses two critical security vulnerabilities (CVE-2026-62886 and…
KB5120233 Sep 26, 2026 KB5120233 is a cumulative security update for Windows Server 2025 released on August 11, 2026 (OS Build 26100.33296). This update includes the latest security fixes, quality improvements, and non-security updates from the previous month's optional preview release. The update addresses…
KB5122882 Sep 26, 2026 KB5122882 is a cumulative security update for Windows Server 2022 released on September 8, 2026 (OS Build 20348.5622). This patch addresses multiple security vulnerabilities and includes quality improvements from the previous month's optional preview release. The update applies to all…
KB5126047 Sep 26, 2026 KB5126047 is a cumulative security and reliability update for .NET Framework 4.8 released on September 8, 2026. It applies to Windows 10 version 1607 and Windows Server 2016. The update addresses two security vulnerabilities and is distributed through Windows Update,…
KB5126041 Sep 26, 2026 KB5126041 is a Setup Dynamic Update for Windows 11 version 26H1 released on September 8, 2026. This update addresses security vulnerabilities in Windows setup binaries and files used during feature updates. The patch applies to all editions of Windows 11…
KB5126146 Sep 26, 2026 KB5126146 is a cumulative security update for .NET Framework 3.5, 4.8, and 4.8.1 released on September 8, 2026, for Windows 10 Version 22H2. This patch addresses two critical security vulnerabilities: an elevation of privilege issue (CVE-2026-62886) and a remote code…
KB5124008 Sep 26, 2026 KB5124008 is a September 8, 2026 security update for Windows 11 versions 24H2 and 25H2 (OS Builds 26200.9445 and 26100.9445). This cumulative update delivers security patches addressing over 900 vulnerabilities, along with quality improvements for system stability and functionality. The…
KB5122871 Sep 26, 2026 KB5122871 is a cumulative security update for Windows Server 2025 released on September 8, 2026 (OS Build 26100.33438). This update incorporates the latest security fixes and quality improvements, including non-security updates from the previous month's optional preview release. The update…
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