August 11, 2026—KB5120240 (OS Build 22631.7517)

August 11, 2026—KB5120240 OS Build 22631.7517 Applies To Windows 11 version 23H2, all editions This cumulative update for Windows 11, version 23H2 KB5120240, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the...

August 11, 2026—KB5120238 (OS Build 17763.9121)

August 11, 2026—KB5120238 OS Build 17763.9121 Applies To Windows Server 2019 Win 10 Ent LTSC 2019 Windows Secure Boot certificate expiration Important Secure Boot certificates used by most Windows devices started to expire in June 2026. Microsoft has been updating these certificates on PCs and...

August 11, 2026—KB5120386 (Monthly Rollup)

August 11, 2026—KB5120386 Monthly Rollup Applies To Windows Server 2012 ESU 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...

August 11, 2026—KB5120385 (Monthly Rollup)

August 11, 2026—KB5120385 Monthly Rollup Applies To Windows Server 2012 R2 ESU 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 su...

August 11, 2026—KB5120249 (OS Builds 19045.7663 and 19044.7663)

August 11, 2026—KB5120249 OS Builds 19045.7663 and 19044.7663 Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows 10 IoT Enterprise LTSC 2021 Windows Secure Boot certificate expiration Important Secure Boot certificates used by most Windows devices started to expire in June 2026...

August 11, 2026—Hotpatch KB5120229 (OS Build 20348.5440)

August 11, 2026—Hotpatch KB5120229 OS Build 20348.5440 Applies To Windows Server 2022 Datacenter: Azure Edition This Hotpatch update for Windows Server 2022 KB5120229 includes security improvements. To learn more about differences between security updates, optional non-security preview updates,...

August 11, 2026—Hotpatch KB5120228 (OS Build 26100.33222)

August 11, 2026—Hotpatch KB5120228 OS Build 26100.33222 Applies To Windows Server 2025 Datacenter: Azure Edition This update applies to Windows Server 2025 Datacenter & Standard machines connected to Azure Arc. To learn more about differences between security updates, optional non-security previe...

August 11, 2026—KB5120233 (OS Build 26100.33296)

August 11, 2026—KB5120233 OS Build 26100.33296 Applies To Windows Server 2025, all editions This cumulative update for Windows Server 2025 KB5120233, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. Visit the Windows...

August 11, 2026—KB5121003 (OS Builds 26200.9168 and 26100.9168)

August 11, 2026—KB5121003 OS Builds 26200.9168 and 26100.9168 Applies To Windows 11 version 25H2, all editions Windows 11 version 24H2, all editions Want a quick overview?: Watch the Windows 11 release note video for this update. --- Announcements and messages This section provides key...

August 11, 2026—KB5121000 (OS Build 28000.2704)

August 11, 2026—KB5121000 OS Build 28000.2704 Applies To Windows 11 version 26H1, all editions This cumulative update for Windows 11, version 26H1 KB5121000 includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release. Visit the...

Description of the security update for Microsoft Exchange Server 2019 CU15: August 11, 2026 (KB5121574)

Description of the security update for Microsoft Exchange Server 2019 CU15: August 11, 2026 KB5121574 Applies To Exchange Server 2019 This security update resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities and...

August 11, 2026-KB5120747 Cumulative Update for .NET Framework 3.5 for Windows 11, version 26H1 (build 28000) and later

August 11, 2026-KB5120747 Cumulative Update for .NET Framework 3.5 for Windows 11, version 26H1 build 28000 and later Applies To .NET Note Release Date: August 11, 2026 Version: .NET Framework 3.5 The August 11, 2026 update installs the complete .NET Framework 3.5 product for Windows 11, version...

KB5123303: Security Update (OS Build 20348.5440)

KB5123303: Security Update OS Build 20348.5440 Applies To Windows Server 2022 Datacenter: Azure Edition Important This update applies only to Windows Server, version 2022 devices enrolled in hotpatch updates. For more information, see Hotpatch updates. Improvements and fixes The following summary...

KB5123607: Security Update (OS Builds 26100.9106 and 26200.9106)

KB5123607: Security Update OS Builds 26100.9106 and 26200.9106 Applies To Windows 11 Enterprise LTSC 2024 Important This update applies only to devices enrolled in hotpatch updates. For more information, see Hotpatch updates. Improvements and fixes The following summary outlines key issues...

August 11, 2026-KB5120709 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2

August 11, 2026-KB5120709 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 10 Version 21H2 and Windows 10 Version 22H2 Applies To .NET Note Revised October 15th, 2026: Add status update to known issue section. Note Release Date: August 11, 2026 Version: .NET Framework 3.5 and 4.8.1...

Description of the security update for SharePoint Server 2019: August 11, 2026 (KB5002894)

Description of the security update for SharePoint Server 2019: August 11, 2026 KB5002894 Applies To SharePoint Server 2019 Summary Important If you're currently running SharePoint Workflow Manager, you must install the SharePoint Workflow Manager KB5002799 to your farm before you install this...

Description of the security update for SharePoint Server 2016 Language Pack: August 11, 2026 (KB5002906)

Description of the security update for SharePoint Server 2016 Language Pack: August 11, 2026 KB5002906 Applies To SharePoint Server 2016 Summary Important If you're running Microsoft SharePoint Server 2013-type workflows, you must install the August 2025 update for SharePoint Workflow Manager to...

Description of the security update for SharePoint Server 2016: August 11, 2026 (KB5002905)

Description of the security update for SharePoint Server 2016: August 11, 2026 KB5002905 Applies To SharePoint Server 2016 Summary Important If you're currently running SharePoint Workflow Manager, you must install the SharePoint Workflow Manager KB5002799 to your farm before you install this...

Description of the security update for Office 2016: August 11, 2026 (KB5002900)

Description of the security update for Office 2016: August 11, 2026 KB5002900 Applies To Office Standard 2016 Office Professional 2016 Office Professional Plus 2016 Office Home and Business 2016 Office Home and Student 2016 Summary This security update resolves a Microsoft Office Remote Code...

Description of the security update for PowerPoint 2016: August 11, 2026 (KB5002899)

Description of the security update for PowerPoint 2016: August 11, 2026 KB5002899 Applies To PowerPoint 2016 Summary This security update resolves a Powerpoint Information Disclosure vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures...