Knowledgebase Catalog

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KB# Last Updated Description
KB5091157 May 02, 2026 KB5091157 is an out-of-band (OOB) cumulative update released on April 19, 2026, for Windows Server 2025 across all editions. This non-security update addresses critical issues that emerged following the April 14, 2026 Patch Tuesday release (KB5082063). The update was released…
KB5082126 May 02, 2026 KB5082126 is an April 2026 monthly rollup security update specifically designed for Windows Server 2012 R2 Extended Security Update (ESU) customers. This cumulative update represents the latest in Microsoft's ongoing commitment to provide security patches and quality improvements for systems…
KB5091575 May 02, 2026 KB5091575 is an out-of-band cumulative security update for Windows Server 2022, released on April 19, 2026, with OS Build 20348.5024. This patch addresses critical issues identified in the previous April 14, 2026 update (KB5082142) and includes a combined servicing stack…
KB5082417 May 02, 2026 KB5082417 is an April 2026 cumulative update for .NET Framework 3.5 and 4.8.1 designed for Windows 11 version 25H2 and Microsoft server operating system 24H2. This patch addresses multiple security vulnerabilities and includes quality improvements for the .NET Framework ecosystem.…
KB5082411 May 02, 2026 KB5082411 is a cumulative security and reliability update for .NET Framework 4.8 released on April 14, 2026, targeting Windows 10 version 1607 and Windows Server 2016 systems. This patch addresses multiple critical security vulnerabilities within the .NET Framework runtime environment,…
KB5082235 May 02, 2026 KB5082235 is a Safe OS Dynamic Update released on April 14, 2026, specifically designed for Windows Server version 23H2. This update focuses on enhancing the Windows Recovery Environment (WinRE), which is a critical component responsible for system recovery and troubleshooting…
KB5084070 May 02, 2026 KB5084070 is a comprehensive security and quality rollup released on April 14, 2026, designed for multiple versions of the .NET Framework running on Windows Server 2012 R2. This update addresses critical vulnerabilities across .NET Framework versions 3.5, 4.6.2, 4.7, 4.7.1,…
KB5091573 May 02, 2026 KB5091573 is an out-of-band security update released on April 19, 2026, for Windows Server 2019 and Windows 10 Enterprise LTSC 2019 (OS Build 17763.8647). This patch addresses critical issues that emerged following the April 14, 2026 security update (KB5082123), particularly…
KB5082243 May 02, 2026 KB5082243 is a Safe OS Dynamic update for Windows Server 2022 released on April 14, 2026. This update specifically targets the Windows Recovery Environment (WinRE), which is a critical component of the Windows operating system responsible for system recovery and…
KB5084165 May 02, 2026 KB5084165 is a security-focused cumulative update for .NET Framework 3.5 released on April 14, 2026, designed for Windows 11 version 26H1 (build 28000) and later. This update represents a significant departure from traditional cumulative patching methodology by delivering the complete…
KB5082402 May 02, 2026 KB5082402 is an Extended Security Update (ESU) released on April 14, 2026, designed for Windows Server 2012 R2 systems running .NET Framework versions 4.6.2, 4.7, 4.7.1, and 4.7.2. This cumulative security and quality rollup addresses multiple critical vulnerabilities in the…
KB5084071 May 02, 2026 KB5084071 is a cumulative security and quality update for the .NET Framework released on April 14, 2026, targeting Windows Server 2022 environments. This patch addresses multiple critical vulnerabilities across .NET Framework versions 3.5, 4.8, and 4.8.1, making it an essential…
KB5082420 May 02, 2026 KB5082420 is a cumulative security and reliability update for the .NET Framework released on April 14, 2026, targeting Windows 11 version 24H2 systems. This patch addresses both .NET Framework 3.5 and 4.8.1, two widely-used runtime environments that support legacy and…
KB5084067 May 02, 2026 KB5084067 is a cumulative security and quality update for the .NET Framework released on April 14, 2026, targeting Windows 10 Version 21H2 systems. This patch addresses multiple critical vulnerabilities across .NET Framework versions 3.5, 4.8, and 4.8.1, with a particular…
KB5082063 May 02, 2026 KB5082063 is the April 2026 cumulative security update for Windows Server 2025, released on April 14, 2026, with OS Build 26100.32690. This update represents a comprehensive monthly security rollup that consolidates the latest security patches and quality improvements, including content…
KB5083769 May 02, 2026 KB5083769 is an April 2026 cumulative security update for Windows 11 versions 25H2 and 24H2, released on April 14, 2026, with OS builds 26200.8246 and 26100.8246. This update consolidates security fixes and quality improvements from multiple previous patches released throughout…
KB5091572 May 02, 2026 KB5091572 is an out-of-band security update released on April 19, 2026, for Windows Server 2016 and Windows 10 version 1607 (OS Build 14393.9062). This emergency patch was issued to address critical issues identified in the April 14, 2026 Patch Tuesday…
KB5083806 May 02, 2026 KB5083806 is a non-security preview update for Windows 11 version 26H1, released on April 30, 2026, with OS Build 28000.1896. This cumulative update delivers production-quality improvements and enhancements across multiple system components, with a particular focus on AI-powered features and…
KB5082123 May 02, 2026 KB5082123 is an April 2026 cumulative security update for Windows Server 2019 and Windows 10 Enterprise LTSC 2019 (OS Build 17763.8644). This update addresses multiple security vulnerabilities and introduces several quality improvements across critical system components. The patch is particularly…
KB5082424 May 02, 2026 KB5082424 is a cumulative security and reliability update for the .NET Framework 3.5 and 4.8.1 components on Windows 11 version 23H2, released on April 14, 2026. This patch addresses multiple critical security vulnerabilities affecting the .NET Framework runtime environment, including…
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