October 14, 2025—KB5066836 (OS Build 14393.8519)

October 14, 2025—KB5066836 OS Build 14393.8519 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 pa...

.NET 8.0 Update - November 11, 2025 (KB5071066)

.NET 8.0 Update - November 11, 2025 KB5071066 .NET 8.0 has been refreshed with the latest update as of November 11, 2025. This update contains non-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...

October 14, 2025-KB5066128 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2

October 14, 2025-KB5066128 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2 Release Date: October 14, 2025 Version: .NET Framework 3.5 and 4.8.1 The October 14, 2025 update for Windows 11, version 25H2 includes security and cumulative reliability improvements in .NE...

September 9, 2025—Hotpatch KB5065306 (OS Build 20348.4106)

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Description of the security update for Office 2016: May 13, 2025 (KB5002711)

Description of the security update for Office 2016: May 13, 2025 KB5002711 Summary This security update resolves a Microsoft Office remote code execution vulnerability. To learn more about the vulnerability, see the following security advisories: Microsoft Common Vulnerabilities and Exposures...

KB5053593: Cumulative security update for Internet Explorer: March 11, 2025

KB5053593: Cumulative security update for Internet Explorer: March 11, 2025 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...

December 10, 2024—KB5048744 (Security-only update)

December 10, 2024—KB5048744 Security-only update End of support information Windows Server 2008 Premium Assurance ends on January 13, 2026.Windows Server 2008 SP2 Extended Security Updates ESU ended on January 10, 2023. Additionally, Extended Security Updates on Azure only support ended on Januar...

Description of the security update for SharePoint Enterprise Server 2016: December 10, 2024 (KB5002659)

Description of the security update for SharePoint Enterprise Server 2016: December 10, 2024 KB5002659 Summary This security update resolves a Microsoft SharePoint remote code execution vulnerability, Microsoft SharePoint elevation of privilege vulnerability, Microsoft SharePoint information...

October 8, 2024—KB5044320 (Monthly Rollup)

October 8, 2024—KB5044320 Monthly Rollup End of support information Windows Server 2008 SP2 Extended Security Updates ESU third and final year ended on January 10, 2023. Additionally, Extended Security Updates on Azure only support ended on January 9, 2024. For more information, see Extended...

KB5043049: Cumulative security update for Internet Explorer: September 10, 2024

KB5043049: Cumulative security update for Internet Explorer: September 10, 2024 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...

Description of the security update for SharePoint Server 2019: April 9, 2024 (KB5002580)

Description of the security update for SharePoint Server 2019: April 9, 2024 KB5002580 Summary This security update resolves a Microsoft SharePoint Server spoofing vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2024-26251. Notes: This ...

April 9, 2024-KB5037087 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Azure Stack HCI, version 22H2

April 9, 2024-KB5037087 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Azure Stack HCI, version 22H2 Release Date: April 9, 2024 Version: .NET Framework 3.5, 4.8 and 4.8.1 Summary This article describes the security and cumulative update for 3.5, 4.8 and 4.8.1 for Azure Stack HCI,...

April 9, 2024-KB5036617 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2

April 9, 2024-KB5036617 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2 Release Date: April 9, 2024 Version: .NET Framework 3.5 and 4.8.1 The April 9, 2024 update for Microsoft server operating system, version 23H2 includes security and...

January 9, 2024-KB5033917 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2

January 9, 2024-KB5033917 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2 Release Date: January 9, 2024 Version: .NET Framework 3.5 and 4.8.1 The January 9, 2024 update for Microsoft server operating system, version 23H2 includes security and...

KB5034866: Servicing stack update for Windows Server 2012 R2: February 13, 2024

KB5034866: Servicing stack update for Windows Server 2012 R2: February 13, 2024 REMINDER Windows 8.1 reached end of support EOS on January 10, 2023, at which point technical assistance and software updates are no longer provided. If you have devices running Windows 8.1, we recommend upgrading the...

September 12, 2023-Security and Quality Rollup for .NET Framework 3.5.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded 7 Standard and Windows Server 2008 R2 SP1 (KB5030182)

September 12, 2023-Security and Quality Rollup for .NET Framework 3.5.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded 7 Standard and Windows Server 2008 R2 SP1 KB5030182 Applies to: Microsoft .NET Framework 3.5.1 Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET...

September 12, 2023—KB5030211 (OS Builds 19044.3448 and 19045.3448) - EXPIRED

September 12, 2023—KB5030211 OS Builds 19044.3448 and 19045.3448 - EXPIRED EXPIRATION NOTICEIMPORTANT As of March 31, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. We recommend that you update your devices to the latest version of Windows. -...

Description of the security update for Office 2013: September 12, 2023 (KB5002477)

Description of the security update for Office 2013: September 12, 2023 KB5002477 Summary This security update resolves a Microsoft Office security feature bypass vulnerability and Microsoft Office spoofing vulnerability. To learn more about the vulnerabilities, see the following security...

Description of the security update for Office 2016: September 12, 2023 (KB5002498)

Description of the security update for Office 2016: September 12, 2023 KB5002498 Summary This security update resolves a Microsoft Office spoofing vulnerability. To learn more about the vulnerability, see ​​Microsoft Common Vulnerabilities and Exposures CVE-2023-41764. Notes: To apply this securi...

End of support for Office 2013

End of support for Office 2013 Support for Office 2013 ended on April 11, 2023 and there will be no extension and no extended security updates. All of your Office 2013 apps will continue to function. However, you could expose yourself to serious and potentially harmful security risks.Buy or try...

Internet Explorer help

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August 8, 2023-KB5028948 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2

August 8, 2023-KB5028948 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2 Revised July 7, 2025: Updated 'How to get this update' section. Release Date: August 8, 2023 Version: .NET Framework 3.5 and 4.8.1 The August 8, 2023 update for Windows 11, version 22H2 includ...

August 8, 2023-KB5028952 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016

August 8, 2023-KB5028952 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1607 and Windows Server 2016 Release Date: August 8, 2023 Version: .NET Framework 4.8 The August 8, 2023 update for Windows 10, version 1607 and Windows Server 2016 includes security and cumulative reliabili...

Description of the security update for SharePoint Enterprise Server 2016: August 8, 2023 (KB5002453)

Description of the security update for SharePoint Enterprise Server 2016: August 8, 2023 KB5002453 Summary This security update resolves a Microsoft SharePoint Server information disclosure vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures...

.NET 7.0 Update - July 11, 2023 (KB5028706)

.NET 7.0 Update - July 11, 2023 KB5028706 NET 7.0 has been refreshed with the latest update as of July 11, 2023. This update contains both security and non-security fixes. See the release notes for details on updated packages..NET 7.0 servicing updates are upgrades. The latest servicing update fo...

Description of the security update for the information disclosure vulnerability in Microsoft Visual Studio 2015 Update 3: June 13, 2023 (KB5026455)

Description of the security update for the information disclosure vulnerability in Microsoft Visual Studio 2015 Update 3: June 13, 2023 KB5026455 Applies to: All Visual Studio 2015 Update 3 editions except Isolated and Integrated Shells, Build Tools, Remote Tools, and Express for Web. Summary An...

Description of the security update for Excel 2013: June 13, 2023 (KB5002414)

Description of the security update for Excel 2013: June 13, 2023 KB5002414 Summary This security update resolves a Microsoft Excel remote code execution vulnerability. To learn more about the vulnerability, see the following security advisories: Microsoft Common Vulnerabilities and Exposures...

Description of the security update for SharePoint Server Subscription Edition: January 10, 2023 (KB5002331)

Description of the security update for SharePoint Server Subscription Edition: January 10, 2023 KB5002331 Summary This security update resolves a Microsoft SharePoint Server remote code execution vulnerability and Microsoft SharePoint Server security feature bypass vulnerability. To learn more...

August 9, 2022—KB5016686 (Security-only update)

August 9, 2022—KB5016686 Security-only update Summary Learn more about this security-only update, including improvements, any known issues, and how to get the update. IMPORTANT Windows Server 2008 Service Pack 2 SP2 has reached the end of mainstream support and are now in extended support. Starti...

Description of the security update for SharePoint Enterprise Server 2016: October 11, 2022 (KB5002287)

Description of the security update for SharePoint Enterprise Server 2016: October 11, 2022 KB5002287 Summary This security update resolves a Microsoft SharePoint Server remote code execution vulnerability. To learn more about the vulnerability, see the following security advisories: Microsoft...

.NET Core 3.1 Update - September 13, 2022 (KB5017903)

.NET Core 3.1 Update - September 13, 2022 KB5017903 .NET Core 3.1 has been refreshed with the latest update as of September 13, 2022. This update contains security and other non-security fixes. See the release notes for details on updated packages. .NET Core 3.1 servicing updates are upgrades, th...

KB5017220: Update for the Extended Security Updates Licensing Preparation Package for Windows Server 2012 R2

KB5017220: Update for the Extended Security Updates Licensing Preparation Package for Windows Server 2012 R2 Introduction This update provides an additional set of licensing changes to enable installation of the ESU add-on key. This is one of the steps to prepare for installation of Extended...

July 12, 2022—KB5015814 (OS Build 22000.795)

July 12, 2022—KB5015814 OS Build 22000.795 For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 11 original release, see its update history page.Note Follow @WindowsUpdate to find out...

KB5010451: Servicing stack update for Windows 7 SP1 and Server 2008 R2 SP1: February 8, 2022

KB5010451: Servicing stack update for Windows 7 SP1 and Server 2008 R2 SP1: February 8, 2022 Summary This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates SSU makes sure that you have a robust and reliable...

Description of the security update for Office 2016: December 14, 2021 (KB4504745)

Description of the security update for Office 2016: December 14, 2021 KB4504745 Summary This security update resolves a Microsoft Office trust center spoofing vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-43255. Note: To apply th...

Description of the security update for Office Online Server: November 9, 2021 (KB5002053)

Description of the security update for Office Online Server: November 9, 2021 KB5002053 Summary This security update resolves a Microsoft Excel remote code execution vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-40442. Notes: To...

Security update 2021-10-12

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Description of the security update for SharePoint Enterprise Server 2016: July 13, 2021 (KB5001976)

Description of the security update for SharePoint Enterprise Server 2016: July 13, 2021 KB5001976 Summary This security update resolves a Microsoft SharePoint Server spoofing vulnerability, SharePoint Server information disclosure vulnerability, and SharePoint Server remote code execution...

July 7, 2021—Hotpatch KB5005007 (OS Build 17784.1769) Out-of-Band

None None...

May 11, 2021—KB5003208 (Monthly Rollup)

May 11, 2021—KB5003208 Monthly Rollup Important: Windows Server 2012 has reached the end of mainstream support and is now in extended support. Starting in July 2020, there will no longer be optional releases known as "C" or "D" releases for this operating system. Operating systems in extended...

Description of the security update for Office Online Server: April 13, 2021 (KB4504714)

Description of the security update for Office Online Server: April 13, 2021 KB4504714 Summary This security update resolves Microsoft Word remote code execution vulnerability, Microsoft Excel remote code execution vulnerability, and Microsoft Excel information disclosure vulnerability. To learn...

Description of the security update for Outlook 2016: April 13, 2021 (KB4504712)

Description of the security update for Outlook 2016: April 13, 2021 KB4504712 Summary This security update resolves a Microsoft Outlook memory corruption vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-28452. Note: To apply this...

Description of the security update for SharePoint Foundation 2010: April 13, 2021 (KB4504709)

Description of the security update for SharePoint Foundation 2010: April 13, 2021 KB4504709 Summary This security update resolves a Microsoft SharePoint denial-of-service attack vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-28450...

Description of the security update for Office 2010: March 9, 2021 (KB4493214)

Description of the security update for Office 2010: March 9, 2021 KB4493214 Summary This security update resolves a Microsoft Excel Remote Code Execution Vulnerability. To learn more about the vulnerability, see the following security advisories: Microsoft Common Vulnerabilities and Exposures...

Description of the security update for Visio 2016: March 9, 2021 (KB4493151)

Description of the security update for Visio 2016: March 9, 2021 KB4493151 Summary This security update resolves a Microsoft Visio Security Feature Bypass Vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-27055. Note: To apply this...

March 9, 2021—KB5000807 (OS Build 10240.18874)

March 9, 2021—KB5000807 OS Build 10240.18874 NEW 3/9/21 IMPORTANT As part of the end of support for Adobe Flash, KB4577586 is now available as an optional update from Windows Update WU and Windows Server Update Services WSUS. Installing KB4577586 will remove Adobe Flash Player permanently from yo...

Description of the security update for SharePoint Foundation 2010: February 9, 2021 (KB4493223)

Description of the security update for SharePoint Foundation 2010: February 9, 2021 KB4493223 Summary This security update resolves Microsoft SharePoint Spoofing Vulnerability, SharePoint Remote Code Execution Vulnerability, and SharePoint Information Disclosure Vulnerability. To learn more about...

Description of the security update for SharePoint Foundation 2010: December 8, 2020

Description of the security update for SharePoint Foundation 2010: December 8, 2020 Summary This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see the...

Description of the security update for Microsoft Exchange Server 2019 and 2016: December 8, 2020

Description of the security update for Microsoft Exchange Server 2019 and 2016: December 8, 2020 This update rollup is a security update that resolves vulnerabilities in Microsoft Exchange. To learn more about these vulnerabilities, see the following Common Vulnerabilities and Exposures CVE:...

Description of the security update for Excel 2016: November 10, 2020

Description of the security update for Excel 2016: November 10, 2020 Summary This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see the following...