Knowledgebase Catalog

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KB# Last Updated Description
KB5126145 Oct 01, 2026 KB5126145 is a cumulative security and quality update for .NET Framework 3.5, 4.8, and 4.8.1 released on September 8, 2026, specifically targeting Windows 10 Version 21H2. This update addresses two critical security vulnerabilities and includes quality improvements to enhance system…
KB5126104 Oct 01, 2026 .NET 8.0 Update released on September 8, 2026, delivering the latest security fixes and improvements for the .NET 8.0 runtime. This servicing update applies to Windows client and server operating systems with .NET 8.0 installed. The update follows Microsoft's standard…
KB5126421 Oct 01, 2026 KB5126421 is a cumulative security and reliability update for .NET Framework 3.5 and 4.8.1 released on September 8, 2026, targeting Windows 10 Version 21H2 and Version 22H2. This patch addresses critical vulnerabilities in the .NET Framework runtime environment. The update…
KB5123499 Oct 01, 2026 KB5123499 is a servicing stack update (SSU) released on September 8, 2026, for Windows Server 2012 R2 Extended Security Updates (ESU). This update improves the servicing stack component responsible for installing Windows updates. The patch ensures devices can reliably receive…
KB5129242 Oct 01, 2026 KB5129242 is an out-of-band cumulative update for Windows 11 version 23H2, released on September 14, 2026 (OS Build 22631.7584). This emergency patch addresses critical issues that emerged following the September 8, 2026 security update (KB5122880), particularly affecting Remote Desktop Services…
KB5124008 Oct 01, 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 addresses security vulnerabilities and includes quality improvements across multiple system components including Secure Boot certificate deployment, mouse…
KB5122887 Oct 01, 2026 KB5122887 is a Safe OS Dynamic Update released on September 8, 2026, designed for Windows 10 versions 21H2 and 22H2, specifically targeting Windows 10 Enterprise LTSC 2021 and ESU editions. This update focuses on improvements to the Windows Recovery Environment…
KB5126053 Oct 01, 2026 KB5126053 is a cumulative update for .NET Framework 4.8.1 released on September 8, 2026, specifically targeting Windows 11 version 26H1. This patch delivers critical security fixes and reliability enhancements to address vulnerabilities and stability issues within the .NET Framework runtime…
KB5123038 Oct 01, 2026 KB5123038 is a cumulative security update for Internet Explorer released on September 8, 2026. It applies to Internet Explorer 11 running on Windows Server 2012 R2 and Windows Server 2012 ESU (Extended Security Updates). This patch addresses multiple vulnerabilities identified…
KB5126147 Oct 01, 2026 This is a Security and Quality Rollup for .NET Framework versions 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, and 4.8 on Windows Server 2012, released on September 8, 2026. The update addresses critical security vulnerabilities and includes quality improvements to enhance system…
KB5122885 Oct 01, 2026 KB5122885 is a Safe OS Dynamic Update released on September 8, 2026, designed for Windows 10 version 1607 and Windows Server 2016. This update specifically improves the Windows Recovery Environment (WinRE), which is critical for system recovery and troubleshooting. The…
KB5126029 Oct 01, 2026 KB5126029 is a Setup Dynamic Update security patch released on September 8, 2026, addressing vulnerabilities in Windows setup binaries and files used during feature updates. It applies to Windows 10 versions 21H2 and 22H2, as well as Windows 10 Enterprise…
KB5129194 Oct 01, 2026 KB5129194 is an out-of-band security update for Windows 11 version 26H1, released on September 14, 2026 (OS Build 28000.2956). This patch addresses critical security vulnerabilities and resolves several functionality issues discovered after the September 8, 2026 security update. The update…
KB5126144 Oct 01, 2026 KB5126144 is a cumulative security and quality update for .NET Framework versions 3.5, 4.7.2, and 4.8 released on September 8, 2026. This patch targets Windows 10 version 1809 and Windows Server 2019 systems. The update is delivered through Windows Update,…
KB5126031 Oct 01, 2026 KB5126031 is a Setup Dynamic Update for Windows Server 2022 released on September 8, 2026. This patch addresses security vulnerabilities found in Windows setup binaries and files utilized during feature updates. The update is applicable to Windows Server 2022 systems…
KB5127216 Oct 01, 2026 KB5127216 is a Setup Dynamic Update released on September 22, 2026, addressing security vulnerabilities in Windows setup binaries and related files used during feature updates. The update applies to Windows 11 versions 24H2, 25H2, and 26H2 across all editions. Installation…
KB5123602 Oct 01, 2026 KB5123602 is a Servicing Stack Update (SSU) for Windows Server 2012 ESU released on September 8, 2026. This update enhances the servicing stack component responsible for installing Windows updates, ensuring devices can reliably receive and install Microsoft patches. The update…
KB5129243 Oct 01, 2026 KB5129243 is an out-of-band emergency update released on September 14, 2026, for Windows Server 2012 R2 ESU (Extended Security Updates). This monthly rollup addresses critical issues introduced by the previous September 2026 security update (KB5123066), particularly affecting Remote Desktop Services…
KB5122871 Oct 01, 2026 KB5122871 is a cumulative security update for Windows Server 2025 released on September 8, 2026 (OS Build 26100.33438). This patch includes the latest security fixes and quality improvements, incorporating non-security updates from the previous month's optional preview release. The update…
KB5129238 Oct 01, 2026 KB5129238 is an out-of-band security update released on September 14, 2026, for Windows 10 version 1809 and Windows Server 2019, bringing the OS Build to 17763.9247. This patch addresses critical security vulnerabilities and system stability issues affecting enterprise and consumer…
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