May 12, 2026-KB5087077 Cumulative Update for .NET Framework 3.5 for Windows 11, version 26H1 (build 28000) and later

May 12, 2026-KB5087077 Cumulative Update for .NET Framework 3.5 for Windows 11, version 26H1 build 28000 and later Release Date: May 12, 2026 Version: .NET Framework 3.5 The May 12, 2026 update installs the complete .NET Framework 3.5 product for Windows 11, version 26H1 build version 28000 and...

May 12, 2026-KB5087052 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2

May 12, 2026-KB5087052 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2 Release Date: May 12, 2026 Version: .NET Framework 3.5 and 4.8.1 The May 12, 2026 update for Microsoft server operating system, version 23H2 includes security and cumulati...

May 12, 2026-Security and Quality Rollup for .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Server 2012 R2 (KB5088861)

May 12, 2026-Security and Quality Rollup for .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Server 2012 R2 KB5088861 Applies to: Microsoft .NET Framework 3.5 Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2...

May 12, 2026-Security and Quality Rollup for .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Server 2012 (KB5088860)

May 12, 2026-Security and Quality Rollup for .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Server 2012 KB5088860 Applies to: Microsoft .NET Framework 3.5 Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2...

Hotfix update for Exchange Server Subscription Edition RTM HU6: May 7, 2026 (KB5081755)

Hotfix update for Exchange Server Subscription Edition RTM HU6: May 7, 2026 KB5081755 Hotfix Update HU 6 for Microsoft Exchange Server SE RTM was released on May 7, 2026. It includes fixes for non-security issues, and might introduce new features. These fixes and features will also be included in...

April 30, 2026—KB5083631 (OS Builds 26200.8328 and 26100.8328) Preview

April 30, 2026—KB5083631 OS Builds 26200.8328 and 26100.8328 Preview ​​​​This non-security update for Windows 11, version 25H2 and 24H2 KB5083631, includes production-quality improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band...

April 30, 2026—KB5083806 (OS Build 28000.1896) Preview

April 30, 2026—KB5083806 OS Build 28000.1896 Preview ​​​​This non-security update for Windows 11, version 26H1 KB5083806, includes production-quality improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band OOB updates, and...

.NET 10.0 Update - April 21, 2026

.NET 10.0 Update - April 21, 2026 .NET 10.0 has been refreshed with the latest update as of April 21, 2026. This update contains security fixes. See the release notes for details about updated packages..NET 10.0 servicing updates are upgrades. The latest servicing update for 10.0 will remove the...

April 19, 2026—KB5091572 (OS Build 14393.9062) Out-of-band

April 19, 2026—KB5091572 OS Build 14393.9062 Out-of-band Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices...

April 19, 2026—KB5091575 (OS Build 20348.5024) Out-of-band

April 19, 2026—KB5091575 OS Build 20348.5024 Out-of-band ​​​​​​​Announcements and messages This section provides key notifications related to this release, including announcements, change logs, and end-of-support notices. Windows Secure Boot certificate expiration Windows Secure Boot certificate...

April 19, 2026—KB5091573 (OS Build 17763.8647) Out-of-band

April 19, 2026—KB5091573 OS Build 17763.8647 Out-of-band Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices...

April 19, 2026—KB5091157 (OS Build 26100.32698) Out-of-band

April 19, 2026—KB5091157 OS Build 26100.32698 Out-of-band ​​​​This out-of-band OOB update for Windows Server 2025 KB5091157 is a non-security cumulative update. Improvements This out-of-band update contains quality improvements from KB5082063 released April 14, 2026. The following summary outline...

April 19, 2026—KB5091571 (OS Build 25398.2276) Out-of-band

April 19, 2026—KB5091571 OS Build 25398.2276 Out-of-band Summary This out-of-band update for Windows Server, version 23H2 KB5091571 is cumulative. It includes fixes and improvements that are part of the following update: April 14, 2026—KB5082060 OS Build 25398.2274 The following is a summary of t...

April 14, 2026-KB5082414 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019

April 14, 2026-KB5082414 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 1809 and Windows Server 2019 Release Date: April 14, 2026 Version: .NET Framework 3.5 and 4.8 The April 14, 2026 update for Windows 10, version 1809 and Windows Server 2019 includes security and...

April 14, 2026-KB5082413 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10, version 1809 and Windows Server 2019

April 14, 2026-KB5082413 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10, version 1809 and Windows Server 2019 Release Date: April 14, 2026 Version: .NET Framework 3.5 and 4.7.2 The April 14, 2026 update for Windows 10, version 1809 and Windows Server 2019 includes security and...

April 14, 2026-KB5082411 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016

April 14, 2026-KB5082411 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016 Release Date: April 14, 2026 Version: .NET Framework 4.8 The April 14, 2026 update for Windows 10, version 1607 and Windows Server 2016 includes security and cumulative reliabili...

KB5083252 - Description of the security update for SQL Server 2022 CU24: April 14, 2026

KB5083252 - Description of the security update for SQL Server 2022 CU24: April 14, 2026 Summary Known issues in this update Improvements and fixes included in this update How to obtain and install the update How to obtain or download the latest cumulative update package for Linux More information...

KB5083245- Description of the security update for SQL Server 2025 CU3: April 14, 2026

KB5083245- Description of the security update for SQL Server 2025 CU3: April 14, 2026 Applies To SQL Server 2025 on Windows all editions, SQL Server 2025 on Linux all editions Summary Known issues in this update Improvements and fixes included in this update How to obtain and install the update H...

KB5082806: Cumulative security update for Internet Explorer: April 14, 2026

KB5082806: Cumulative security update for Internet Explorer: April 14, 2026 Important Certain versions of Microsoft Internet Explorer have reached the end of support. Note that some versions of Internet Explorer may be supported past the latest OS end date when Extended Security Updates ESUs are...

April 14, 2026-KB5082427 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2022

April 14, 2026-KB5082427 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2022 Release Date: April 14, 2026 Version: .NET Framework 3.5 and 4.8 The April 14, 2026 update for Windows Server 2022 includes security and cumulative reliability improvements in .NET Framework 3.5 and...

April 14, 2026-KB5082426 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 and Windows 10 Version 22H2

April 14, 2026-KB5082426 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 21H2 and Windows 10 Version 22H2 Revised April 22, 2026: Revised on April 22nd, 2026 to add the known issue section. Release Date: April 14, 2026 Version: .NET Framework 3.5 and 4.8 The April 14, 2026...

April 14, 2026-KB5082425 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows Server 2022

April 14, 2026-KB5082425 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows Server 2022 Release Date: April 14, 2026 Version: .NET Framework 3.5 and 4.8.1 The April 14, 2026 update for Windows Server 2022 includes security and cumulative reliability improvements in .NET Framework 3.5...

April 14, 2026-KB5082419 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2

April 14, 2026-KB5082419 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2 Revised April 22, 2026: Revised on April 22nd, 2026 to add the known issue section. Release Date: April 14, 2026 Version: .NET Framework 3.5 and 4.8.1 The April 14,...

April 14, 2026-KB5082418 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2

April 14, 2026-KB5082418 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2 Release Date: April 14, 2026 Version: .NET Framework 3.5 and 4.8.1 The April 14, 2026 update for Microsoft server operating system, version 23H2 includes security and...

April 14, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 (KB5082406)

April 14, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 R2 KB5082406 Applies to: Microsoft .NET Framework 3.5 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running...

April 14, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 (KB5082404)

April 14, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 R2 KB5082404 Applies to: Microsoft .NET Framework 4.8 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running...

.NET 9.0 Update - April 14, 2026

.NET 9.0 Update - April 14, 2026 .NET 9.0 has been refreshed with the latest update as of April 14, 2026. This update contains security fixes. See the release notes for details about updated packages..NET 9.0 servicing updates are upgrades. The latest servicing update for 9.0 will remove the...

.NET 8.0 Update - April 14, 2026

.NET 8.0 Update - April 14, 2026 .NET 8.0 has been refreshed with the latest update as of April 14, 2026. This update contains security fixes. See the release notes for details about updated packages..NET 8.0 servicing updates are upgrades. The latest servicing update for 8.0 will remove the...

.NET 10.0 Update - April 14, 2026

.NET 10.0 Update - April 14, 2026 .NET 10.0 has been refreshed with the latest update as of April 14, 2026. This update contains security fixes. See the release notes for details about updated packages..NET 10.0 servicing updates are upgrades. The latest servicing update for 10.0 will remove the...

KB5084815 - Description of the security update for SQL Server 2022 GDR: April 14, 2026

KB5084815 - Description of the security update for SQL Server 2022 GDR: April 14, 2026 Summary Known issue in this update Improvements and fixes included in this update How to obtain and install the update More information File information ​​​​​​​Information about protection and security Summary...

KB5084814 - Description of the security update for SQL Server 2025 GDR: April 14, 2026

KB5084814 - Description of the security update for SQL Server 2025 GDR: April 14, 2026 Applies To SQL Server 2025 on Windows all editions, SQL Server 2025 on Linux all editions Summary Known issues in this update Improvements and fixes included in this update How to obtain and install the update...

KB5084818 - Description of the security update for SQL Server 2017 CU31: April 14, 2026

KB5084818 - Description of the security update for SQL Server 2017 CU31: April 14, 2026 Summary Known issues in this update Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection and security Summary This...

KB5084817- Description of the security update for SQL Server 2019 GDR: April 14, 2026

KB5084817- Description of the security update for SQL Server 2019 GDR: April 14, 2026 Summary Known issues in this update Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection and security Summary This...

KB5084816 - Description of the security update for SQL Server 2019 CU32: April 14, 2026

KB5084816 - Description of the security update for SQL Server 2019 CU32: April 14, 2026 Summary Known issues in this update Improvements and fixes included in this update How to obtain and install the update How to obtain or download the latest cumulative update package for Linux More information...

KB5084821 - Description of the security update for SQL Server 2016 SP3 GDR: April 14, 2026

KB5084821 - Description of the security update for SQL Server 2016 SP3 GDR: April 14, 2026 Summary Known issues in this update Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection and security Summary Th...

KB5084820 - Description of the security update for SQL Server 2016 SP3 Azure Connect Feature Pack: April 14, 2026

KB5084820 - Description of the security update for SQL Server 2016 SP3 Azure Connect Feature Pack: April 14, 2026 Summary Known issues in this update Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection...

KB5084819 - Description of the security update for SQL Server 2017 GDR: April 14, 2026

KB5084819 - Description of the security update for SQL Server 2017 GDR: April 14, 2026 Summary Known issues in this update Improvements and fixes included in this update How to obtain and install the update More information File information Information about protection and security Summary This...

April 14, 2026—KB5082126 (Monthly Rollup)

April 14, 2026—KB5082126 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make sure all Subset of endpoints for ESU only...

April 14, 2026—KB5082123 (OS Build 17763.8644)

April 14, 2026—KB5082123 OS Build 17763.8644 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the past...

April 14, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 (KB5082403)

April 14, 2026-Security and Quality Rollup for .NET Framework 4.8 for Windows Server 2012 KB5082403 Applies to: Microsoft .NET Framework 4.8 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows...

April 14, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 R2 (KB5082402)

April 14, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 R2 KB5082402 Applies to: Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2 Important The installation of this...

April 14, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 (KB5082400)

April 14, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 KB5082400 Applies to: Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2 Important The installation of this Extende...

April 14, 2026—KB5082200 (OS Builds 19045.7184 and 19044.7184)

April 14, 2026—KB5082200 OS Builds 19045.7184 and 19044.7184 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business...

April 14, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 (KB5082398)

April 14, 2026-Security and Quality Rollup for .NET Framework 3.5 for Windows Server 2012 KB5082398 Applies to: Microsoft .NET Framework 3.5 Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows...

April 14, 2026—KB5083768 (OS Build 28000.1836)

April 14, 2026—KB5083768 OS Build 28000.1836 ​​​​​This security update for Windows 11, version 26H1 KB5083768, includes the latest security improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates, optional...

April 14, 2026-KB5082420 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2

April 14, 2026-KB5082420 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 Release Date: April 14, 2026 Version: .NET Framework 3.5 and 4.8.1 The April 14, 2026 update for Windows 11, version 24H2 includes security and cumulative reliability improvements in .NET...

April 14, 2026—KB5082142 (OS Build 20348.5020)

April 14, 2026—KB5082142 OS Build 20348.5020 This cumulative update for Windows Server 2022 KB5082142, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates, optiona...

April 14, 2026—KB5082127 (Monthly Rollup)

April 14, 2026—KB5082127 Monthly Rollup Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure all Subset of endpoints for ESU only ar...

April 14, 2026—KB5082052 (OS Build 22631.6936)

April 14, 2026—KB5082052 OS Build 22631.6936 ​​​​​This cumulative update for Windows 11, version 23H2 KB5082052, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security update...

April 14, 2026—KB5083769 (OS Builds 26200.8246 and 26100.8246)

April 14, 2026—KB5083769 OS Builds 26200.8246 and 26100.8246 This cumulative update for Windows 11, version 25H2 and 24H2 KB5083769, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences...