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Microsoft Patch Tuesday, September 2026

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Microsoft's September 2026 security release, published September 8, 2026: 60 updates fixing 1,169 CVEs, ranked by confirmed exploitation, ransomware use, and severity. Provided by Senserva.

Microsoft's Severity ratings

Of the 1,169 CVEs in Microsoft's September 2026 release document, Microsoft rated 118 Critical, 910 Important, 104 Moderate and 14 Low; 23 carry no rating. Source: MSRC CVRF 2026-Sep, read 2026-09-08.

60
Updates (KBs)
1,169
CVEs fixed
2
Exploited zero-day
2
On the CISA KEV list
118
Critical, rated by Microsoft

Severity, as Microsoft rates it

Critical 118Important 910Moderate 104Low 14No rating 23

That covers 1,146 of the 1,169; the remaining 23 carry no Severity rating at all.

Zero-days in this release

CVE-2026-81963Windows Update StackCVSS 7.8Exploited
CVE-2026-85880Windows Advanced Local Procedure Call (ALPC)CVSS 7.8Exploited

Actively exploited CVEs (CISA KEV)

CVE-2026-85880Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege VulnerabilityCVSS 7.8Exploited
CVE-2026-81963Windows Update Stack Elevation of Privilege VulnerabilityCVSS 7.8Exploited

Other high-risk CVEs (CVSS 8.8+)

CVE-2026-68839Windows USB Mass Storage Class Driver Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69276Microsoft UxTheme Library (uxtheme.dll) Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69408Microsoft Windows Media Foundation Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69431Telnet Client Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69463Windows NTFS Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69491Microsoft DirectMusic Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69493Windows Event Logging Service Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69496Windows Compressed Folder Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69525Remote Desktop Services Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69579Windows Message Queuing Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69586Microsoft Windows PDF Remote Code Execution VulnerabilityCVSS 9.8
CVE-2026-69590Windows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityCVSS 9.8

Products fixed this month

Microsoft Office 2016 (32-bit edition) (6)Microsoft Office 2016 (64-bit edition) (6)Windows 10 Version 1607 for 32-bit Systems (2)Windows 10 Version 1607 for x64-based Systems (2)Windows Server 2016 (2)Windows Server 2016 (Server Core installation) (2)Microsoft Word 2016 (32-bit edition) (2)Microsoft Word 2016 (64-bit edition) (2)Microsoft Access 2016 (32-bit edition) (2)Microsoft Access 2016 (64-bit edition) (2)

Every update in this release

All 46 update articles, worst first: anything on the CISA KEV list, then by highest CVSS. Each row links our page for the update, Microsoft's support article, and the Update Catalog for a standalone download.

UpdateSeverityMax CVSSCVEs fixedProductsAlso
KB5122876 ExploitedCritical9.8620Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, and 1 moreSupport · Catalog
KB5122882 ExploitedCritical9.8645Windows Server 2022, Windows Server 2022 (Server Core installation)Support · Catalog
KB5122878 ExploitedCritical9.8572Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, and 3 moreSupport · Catalog
KB5123099 ExploitedCritical9.8559Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016, and 4 moreSupport · Catalog
KB5123065 ExploitedCritical9.8398Windows Server 2012, Windows Server 2012 (Server Core installation)Support · Catalog
KB5123066 ExploitedCritical9.8423Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)Support · Catalog
KB5122871 ExploitedCritical9.8684Windows Server 2025 (Server Core installation), Windows Server 2025Support · Catalog
KB5124008 ExploitedCritical9.8635Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, and 1 moreSupport · Catalog
KB5122880 ExploitedCritical9.8608Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based SystemsSupport · Catalog
KB5124012 ExploitedCritical9.8634Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based SystemsSupport · Catalog
KB5122773Critical9.852Microsoft SQL Server 2019 for x64-based Systems (GDR)Support · Catalog
KB5122771Critical9.852Microsoft SQL Server 2022 for x64-based Systems (GDR)Support · Catalog
KB5122770Critical9.856Microsoft SQL Server 2025 for x64-based Systems (GDR)Support · Catalog
KB5122772Critical9.852Microsoft SQL Server 2019 for x64-based Systems (CU 32)Support · Catalog
KB5122769Critical9.856Microsoft SQL Server 2025 for x64-based Systems (CU8)Support · Catalog
KB5122768Critical9.852Microsoft SQL Server 2022 for x64-based Systems (CU 26)Support · Catalog
KB5123301Critical9.810Skype for Business Server 2015 CU13Support · Catalog
KB5123287Critical9.810Skype for Business Server Subscription Edition CU1Support · Catalog
KB5123300Critical9.810Skype for Business Server 2019 CU8Support · Catalog
KB5122775Critical9.845Microsoft SQL Server 2017 for x64-based Systems (GDR)Support · Catalog
KB5122774Critical9.845Microsoft SQL Server 2017 for x64-based Systems (CU 31)Support · Catalog
KB5002923Critical9.831Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition), Microsoft Word 2016 (32-bit edition), and 1 moreSupport · Catalog
KB5121610Critical9.39Microsoft Exchange Server 2019 Cumulative Update 14Support · Catalog
KB5121609Critical9.39Microsoft Exchange Server 2019 Cumulative Update 15Support · Catalog
KB5121608Critical9.39Microsoft Exchange Server Subscription Edition RTMSupport · Catalog
KB5121611Critical9.38Microsoft Exchange Server 2016 Cumulative Update 23Support · Catalog
KB5002644High8.82Microsoft Publisher 2016 (32-bit edition), Microsoft Publisher 2016 (64-bit edition)Support · Catalog
KB5002908High8.816Microsoft SharePoint Server Subscription EditionSupport · Catalog
KB5123731High8.81Microsoft Dynamics 365 Customer Engagement V9.1Support · Catalog
KB5002920High8.86Microsoft PowerPoint 2016 (32-bit edition), Microsoft PowerPoint 2016 (64-bit edition)Support · Catalog
KB5002916High8.818Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition), Microsoft Word 2016 (32-bit edition), and 1 moreSupport · Catalog
KB5002919High8.83Microsoft Outlook 2016 (32-bit edition), Microsoft Outlook 2016 (64-bit edition)Support · Catalog
KB5002898High8.82Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)Support · Catalog
KB5126104High8.85.NET 8.0 installed on Windows, .NET 8.0 installed on Mac OS, .NET 8.0 installed on Linux, and 1 moreSupport · Catalog
KB5126105High8.86.NET 9.0 installed on Mac OS, .NET 9.0 installed on Windows, .NET 9.0 installed on Linux, and 1 moreSupport · Catalog
KB5126106High8.86.NET 10.0 installed on Windows, .NET 10.0 installed on Linux, .NET 10.0 installed on Mac OS, and 1 moreSupport · Catalog
KB5126048High8.81Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019, and 1 moreSupport · Catalog
KB5126050High8.81Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022Support · Catalog
KB5126422High8.81Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022Support · Catalog
KB5002912High8.82Microsoft Access 2016 (32-bit edition), Microsoft Access 2016 (64-bit edition)Support · Catalog
KB5002914High8.830Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)Support · Catalog
KB5002904High8.830Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)Support · Catalog
KB5122874High8.81Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016, and 1 moreSupport · Catalog
KB5002913High8.82Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition), Microsoft Access 2016 (32-bit edition), and 1 moreSupport · Catalog
KB4011160High8.81Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)Support · Catalog
KB5002910High7.85Office Online ServerSupport · Catalog
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Reference: Microsoft CVE and vulnerability management, ranked by real-world risk, and the Microsoft patching guide.
Data notice: this page is provided as is, for informational purposes only, without warranty of any kind. Senserva, LLC does not guarantee the accuracy, completeness, or timeliness of third-party data (MSRC, NVD, CISA KEV, EPSS) and accepts no liability for actions taken based on it; verify against the authoritative Microsoft advisory before acting. Built daily with Senserva Trustworthy AI. All use of this data is subject to the Senserva EULA.