Overview of Windows Security Updates September 2025

[harlan4096]

Usually, we post Windows Security Updates once they are out. This time it's a little delayed, but here it is nonetheless.

Microsoft Windows Security Updates: September 2025

Executive Summary

Microsoft has released 86 security updates for Microsoft products (9 critical and 72 important), and 5 patches for non-Microsoft issues (like Chromium).

For those of you who want all the details of the patches from the released updates, head to this page: Windows Security Updates September 2025.

Windows clients with known issues

• Windows 10: None
  
• Windows 11: Windows 11, version 24H2 (PowerShell Direct (PSDirect) connections failing in hotpatched devices)
  
• Windows Server 2008, Windows Server 2022, Windows Server 2025.
  

Windows Security UpdatesWindows 10 version 22H2

• Support Page: KB5065429
  
• Security fixes and improvements
  
• This update fixes an issue that caused non-admin users to run into UAC prompts when MSI installers/repairs perform certain actions. It affected Office Professional Plus 2010 and multiple applications from Autodesk including AutoCAD. An issue related to WinSock was fixed.
  
• Refer to this optional update page for more changes in this update.
  

Windows 11 version 22H2 / 23H2

• Support Page: KB5065431
  
• Security fixes and improvements
  
• This update fixes an issue that caused non-admin users to run into UAC prompts when MSI installers/repairs perform certain actions. It affected Office Professional Plus 2010 and multiple applications from Autodesk including AutoCAD. An issue related to WinSock was fixed.
  
• Optional update page with more changes included in this update.
  

Windows 11 version 24H2

• Support page: KB5065426
  
• Security fixes and improvements
  
• An input issue that caused certain apps to stop responding was resolved. A bug that caused Internet Information Services (IIS) modules to disappear from IIS Manager was addressed in this update. A Network Device Interface (NDI) issue that affected audio in apps was fixed.
  
• Refer to the optional update page for additional information.
  

Known Issue: Installing the KB5063878 can cause audio stutter when Display Capture is on in OBS Studio.

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