Knowledgebase Catalog

June 2026

KB#Last UpdatedDescription
KB5089591Jun 09, 2026KB5089591 is a Safe OS Dynamic Update released on May 12, 2026, specifically designed for Windows 11 version 26H1 across all editions. This update focuses on enhancing the Windows Recovery Environment (WinRE), which is a critical component responsible for system…
KB5089570Jun 09, 2026KB5089570 represents a cumulative preview update for Windows 11 version 26H1, released on May 26, 2026, with OS Build 28000.2179. This update delivers production-quality improvements and enhancements across multiple system components, including user interface refinements, security enhancements, and performance optimizations.…
KB5089592Jun 09, 2026KB5089592 is a Safe OS Dynamic Update for Windows 11 version 26H1, released on May 26, 2026. This update addresses critical infrastructure concerns related to Windows Secure Boot certificate expiration, which affects the majority of Windows devices globally. The update…
KB5087470Jun 09, 2026KB5087470 is a Monthly Rollup security update for Windows Server 2012 ESU (Extended Security Update) released on May 12, 2026. This cumulative security patch incorporates fixes and quality improvements from the April 14, 2026 Monthly Rollup (KB5082127) and addresses multiple…
KB5092430Jun 09, 2026KB5092430 is a cumulative update preview released on May 26, 2026, targeting .NET Framework 3.5 and 4.8.1 on Windows 11 version 24H2. This update represents Microsoft's ongoing commitment to maintaining the stability and reliability of the .NET Framework ecosystem through…
KB5087048Jun 09, 2026KB5087048 is a security and quality rollup update released on May 12, 2026, specifically designed for .NET Framework 3.5 running on Windows Server 2012. This update is part of Microsoft's Extended Security Updates (ESU) program, which provides continued security coverage…
KB5087069Jun 09, 2026KB5087069 is a security and quality rollup update for .NET Framework 4.8 released on May 12, 2026, specifically designed for Windows Server 2012 R2 systems. This update is part of Microsoft's Extended Security Updates (ESU) program, which provides continued security…
KB5087539Jun 09, 2026KB5087539 is a cumulative security update for Windows Server 2025 released on May 12, 2026, with OS Build 26100.32860. This update consolidates the latest security fixes and quality improvements from previous months' optional preview releases, including updates from KB5082063 (April…
KB5088859Jun 09, 2026KB5088859 is a cumulative security and quality update for the .NET Framework targeting multiple versions (3.5, 4.8, and 4.8.1) on Windows 10 Version 21H2, released on May 12, 2026. This update consolidates security patches and reliability improvements into a single…
KB5093448Jun 09, 2026.NET 9.0 Update - May 12, 2026 represents a servicing update for the .NET 9.0 runtime environment, delivering critical security enhancements and maintenance improvements to the platform. This update is part of Microsoft's ongoing commitment to maintaining the security and…
KB5093446Jun 09, 2026.NET 10.0 Update (KB5093446) represents a servicing release issued on May 12, 2026, designed to deliver critical security enhancements and stability improvements to the .NET 10.0 runtime environment. This update is automatically available through Microsoft Update for Windows client systems…
KB5087061Jun 09, 2026KB5087061 is a cumulative security update for .NET Framework versions 3.5 and 4.7.2 released on May 12, 2026, targeting Windows 10 version 1809 and Windows Server 2019 systems. This patch represents Microsoft's ongoing commitment to maintaining security posture for legacy…
KB5087051Jun 09, 2026KB5087051 is a cumulative security update for .NET Framework 3.5 and 4.8.1 released on May 12, 2026, designed for Windows 11 version 25H2 and Microsoft server operating system 24H2. This patch addresses critical security vulnerabilities within the .NET Framework runtime…
KB5088864Jun 09, 2026KB5088864 is a cumulative security and quality update released on May 12, 2026, designed for the .NET Framework across multiple versions including 3.5, 4.7.2, and 4.8 on Windows 10 version 1809 and Windows Server 2019 systems. This update represents Microsoft's…
KB5087068Jun 09, 2026KB5087068 is a cumulative security and reliability update for .NET Framework 3.5 and 4.8 deployed on Windows Server 2022, released on May 12, 2026. This patch addresses critical elevation of privilege vulnerabilities within the .NET Framework runtime environment that could…
KB5087590Jun 09, 2026KB5087590 is a Safe OS Dynamic Update released on May 12, 2026, specifically designed for Windows 10 version 1607 and Windows Server 2016. This update focuses on enhancing the Windows Recovery Environment (WinRE), which is the critical system component responsible…
KB5088064Jun 09, 2026KB5088064 is a servicing stack update (SSU) released on May 12, 2026, designed for Windows 10 version 1607 Enterprise LTSB, Windows 10 IoT Enterprise LTSB, and Windows Server 2016 across all editions. This update addresses critical infrastructure components responsible for…
KB5089573Jun 09, 2026KB5089573 is a cumulative quality update for Windows 11 versions 25H2 and 24H2, released on May 26, 2026, with OS builds 26200.8524 and 26100.8524. This update represents a significant milestone in Windows 11's development, delivering production-quality improvements focused on system…
KB5096160Jun 09, 2026KB5096160 is a Setup Dynamic Update released on May 26, 2026, specifically designed for Windows 11 version 26H1 across all editions. This update focuses on enhancing the Windows setup infrastructure and the binaries utilized during feature update deployments. The patch…
KB5092427Jun 09, 2026KB5092427 is a cumulative update preview released on May 26, 2026, targeting .NET Framework 3.5 and 4.8.1 on Windows 11 version 25H2. This update is part of Microsoft's regular maintenance cycle and combines quality improvements with reliability enhancements for the…
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