August 2026 Patch Tuesday
Microsoft's August 2026 security release came out on Tuesday, August 11, 2026. Below: the updates for each Windows version, the holes that were already under attack, and the rest of the release.
Microsoft data read Last revised by Microsoft Oct 16, 2026
Windows 11 and Windows 10
| Update | Applies to | Build after update | CVEs |
|---|---|---|---|
| KB5121000Security Update | Windows 11 Version 26H1 | 28000.2704 | 192 |
| KB5121003Security Update | Windows 11 Version 24H2, Windows 11 Version 25H2 | 26100.9168, 26200.9168 | 191 |
| KB5120994Security Hotpatch Update | Windows 11 Version 24H2, Windows 11 Version 25H2 | 26100.9106, 26200.9106 | 191 |
| KB5120238Security Update | Windows 10 Version 1809, Windows Server 2019 | 17763.9121 | 181 |
| KB5120418Security Update | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607, Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016, Windows 10 Version 1607, Windows Server 2016 | 14393.9418 | 168 |
| KB5120240Security Update | Windows 11 Version 23H2 | 22631.7517 | 167 |
| KB5120249Security Update | Windows 10 Version 21H2, Windows 10 Version 22H2 | 19044.7663, 19045.7663 | 157 |
| KB5129195Security Update | Windows 11 Version 24H2, Windows 11 Version 25H2 | 26100.9457, 26200.9457 | 1 |
| KB5129241Security Hotpatch Update | Windows 11 Version 24H2, Windows 11 Version 25H2 | 26100.9448, 26200.9448 | 1 |
| KB5129194Security Update | Windows 11 Version 26H1 | 28000.2956 | 1 |
| KB5123607Security Hotpatch Update | Windows 11 Version 24H2, Windows 11 Version 25H2 | 26100.9165, 26200.9165 | 1 |
| KB5123273Security Update | Windows 11 Version 24H2, Windows 11 Version 25H2 | 26100.9165, 26200.9165 | 1 |
Already exploited when fixed
| CVE | Type | CVSS | Severity |
|---|---|---|---|
| CVE-2026-68820Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability | Elevation of Privilege | 7.0 | ExploitedImportant |
Publicly known before the fix
| CVE | Type | CVSS | Severity |
|---|---|---|---|
| CVE-2026-69414Microsoft Defender Elevation of Privilege Vulnerability | Elevation of Privilege | 7.8 | Important |
| CVE-2026-72971Windows Container Isolation FS Filter Driver (unionfs.sys) Tampering Vulnerability | Tampering | 5.5 | Important |
Critical fixes with the highest scores
| CVE | Type | CVSS | Severity |
|---|---|---|---|
| CVE-2026-56162Azure SQL Database Elevation of Privilege Vulnerability | Elevation of Privilege | 10.0 | Critical |
| CVE-2026-63508Microsoft Planetary Computer Pro Elevation of Privilege Vulnerability | Elevation of Privilege | 10.0 | Critical |
| CVE-2026-65667Microsoft Teams Elevation of Privilege Vulnerability | Elevation of Privilege | 10.0 | Critical |
| CVE-2026-65770Azure Managed Instance for Apache Cassandra Remote Code Execution Vulnerability | Remote Code Execution | 10.0 | Critical |
| CVE-2026-65801Microsoft Exchange Online Elevation of Privilege Vulnerability | Elevation of Privilege | 10.0 | Critical |
| CVE-2026-65816Azure Arc Elevation of Privilege Vulnerability | Elevation of Privilege | 10.0 | Critical |
| CVE-2026-69502Azure SQL Database Elevation of Privilege Vulnerability | Elevation of Privilege | 10.0 | Critical |
| CVE-2026-69555Azure Arc Elevation of Privilege Vulnerability | Elevation of Privilege | 10.0 | Critical |
| CVE-2026-69836Microsoft Entra ID Remote Code Execution Vulnerability | Remote Code Execution | 10.0 | Critical |
| CVE-2026-50481Azure Active Directory Elevation of Privilege Vulnerability | Elevation of Privilege | 9.9 | Critical |
| CVE-2026-50515Azure Service Bus Remote Code Execution Vulnerability | Remote Code Execution | 9.9 | Critical |
| CVE-2026-59115Microsoft Entra Provisioning Service Elevation of Privilege Vulnerability | Elevation of Privilege | 9.9 | Critical |
Servers and other products
| Update | Applies to | CVEs |
|---|---|---|
| KB5120233Security Update | Windows Server 2025 | 212 |
| KB5120228Security Hotpatch Update | Windows Server 2025 | 212 |
| KB5120242Security Update | Windows Server 2022 | 192 |
| KB5120229Security Hotpatch Update | Windows Server 2022 | 192 |
| KB5120385Monthly Rollup | Windows Server 2012 R2 | 142 |
| KB5120386Monthly Rollup | Windows Server 2012 | 137 |
| KB5002893Security Update | Microsoft SharePoint Server Subscription Edition | 28 |
| KB5002894Security Update | Microsoft SharePoint Server 2019 | 26 |
| KB5002896Security Update | Microsoft SharePoint Server 2019 | 25 |
| KB5002884Security Update | Office Online Server | 24 |
| KB5002903Security Update | Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition) | 24 |
| KB5002905Security Update | Microsoft SharePoint Enterprise Server 2016 | 22 |
| KB5002906Security Update | Microsoft SharePoint Enterprise Server 2016 | 21 |
| KB5002901Security Update | Microsoft Word 2016 (32-bit edition), Microsoft Word 2016 (64-bit edition) | 17 |
| KB5002897Security Update | Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition) | 12 |
| KB5122104Security Update | .NET 8.0 installed on Linux, .NET 8.0 installed on Mac OS, .NET 8.0 installed on Windows | 9 |
| KB5122105Security Update | .NET 9.0 installed on Linux, .NET 9.0 installed on Mac OS, .NET 9.0 installed on Windows | 9 |
| KB5122106Security Update | .NET 10.0 installed on Linux, .NET 10.0 installed on Mac OS, .NET 10.0 installed on Windows | 7 |
| KB5121573Security Update | Microsoft Exchange Server Subscription Edition RTM | 7 |
| KB5121576Security Update | Microsoft Exchange Server 2016 Cumulative Update 23 | 7 |
| KB5121574Security Update | Microsoft Exchange Server 2019 Cumulative Update 15 | 7 |
| KB5121575Security Update | Microsoft Exchange Server 2019 Cumulative Update 14 | 7 |
| KB5120703Security Update | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809, Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | 5 |
| KB5120747Security Update | Microsoft .NET Framework 3.5 on Windows 11 Version 26H1, Microsoft .NET Framework 3.5 on Windows 11 version 26H1 | 5 |
| KB5002832Security Update | Microsoft Access 2016 (32-bit edition), Microsoft Access 2016 (64-bit edition) | 5 |
| KB5120698Security Update | Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809, Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 | 4 |
| KB5120711Security Update | Microsoft .NET Framework 4.8.1 on Windows 11 Version 26H1, Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1 | 4 |
| KB5120702Security Update | Microsoft .NET Framework 4.8 on Windows 10 Version 1607, Microsoft .NET Framework 4.8 on Windows Server 2016 | 3 |
| KB5120706Security Update | Microsoft .NET Framework 4.8 on Windows Server 2012 R2 | 3 |
| KB5120701Security Update | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 | 3 |
| KB5120699Security Update | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 | 3 |
| KB5120700Security Update | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 | 3 |
| KB5120714Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 | 3 |
| KB5120709Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 | 3 |
| KB5120708Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 | 3 |
| KB5120713Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 | 3 |
| KB5120710Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 | 3 |
| KB5120695Security Update | Microsoft .NET Framework 3.5 on Windows Server 2012 R2 | 3 |
| KB5120716Security Update | Microsoft .NET Framework 3.5 on Windows Server 2012 | 3 |
| KB5120704Security Update | Microsoft .NET Framework 4.8 on Windows Server 2012 | 3 |
| KB5120705Security Update | Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 | 3 |
| KB5002755Security Update | Microsoft Outlook 2016 (32-bit edition), Microsoft Outlook 2016 (64-bit edition) | 3 |
| KB5123303Security Update | Windows Server 2022 | 3 |
| KB5100263Security Update | Microsoft Dynamics 365 Business Central Release Wave 1 2025 | 1 |
| KB5100266Security Update | Microsoft Dynamics 365 Business Central 2026 Release Wave 1 | 1 |
| KB5100265Security Update | Microsoft Dynamics 365 Business Central Release Wave 2 2025 | 1 |
| KB5127660Security Update | Microsoft .NET Framework 3.5 on Windows Server 2012 | 1 |
| KB5126044Security Update | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 | 1 |
| KB5126049Security Update | Microsoft .NET Framework 4.8 on Windows Server 2012 | 1 |
| KB5126051Security Update | Microsoft .NET Framework 4.8 on Windows Server 2012 R2 | 1 |
| KB5126047Security Update | Microsoft .NET Framework 4.8 on Windows 10 Version 1607, Microsoft .NET Framework 4.8 on Windows Server 2016 | 1 |
| KB5127666Security Update | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019 | 1 |
| KB5127685Security Update | Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | 1 |
| KB5127693Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 | 1 |
| KB5126043Security Update | Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 | 1 |
| KB5126046Security Update | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 | 1 |
| KB5126421Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 | 1 |
| KB5126052Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 | 1 |
| KB5126053Security Update | Microsoft .NET Framework 4.8.1 on Windows 11 Version 26H1, Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1 | 1 |
| KB5127664Security Update | Microsoft .NET Framework 3.5 on Windows Server 2012 R2 | 1 |
| KB5126045Security Update | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 | 1 |
| KB5126868Security Update | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 | 1 |
| KB5127687Security Update | Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 | 1 |
| KB5127690Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 24H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 25H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 | 1 |
| KB5123099Security Update | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 | 1 |
| KB5126424Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 | 1 |
| KB5127689Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 21H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 22H2 | 1 |
| KB5127692Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 23H2 | 1 |
| KB5127694Security Update | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H2 | 1 |
| KB5002902Security Update | Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition) | 1 |
| KB5002813Security Update | Microsoft Access 2016 (32-bit edition), Microsoft Access 2016 (64-bit edition) | 1 |
| KB5002791Security Update | Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition) | 1 |
| KB5002795Security Update | Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition) | 1 |
| KB5002900Security Update | Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition) | 1 |
| KB5002927Security Update | Microsoft SharePoint Server Subscription Edition | 1 |
| KB5002899Security Update | Microsoft PowerPoint 2016 (32-bit edition), Microsoft PowerPoint 2016 (64-bit edition) | 1 |
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