The Windows September 2023 security updates are now available

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Microsoft published security updates for Windows and also other company products today on the September 2023 Patch Day. Security updates are available for all supported client and server versions of Windows and other products, including Microsoft Office. All client versions of Windows that are supported by Microsoft are affected by a single critically rated vulnerability.

The updates are released via Windows Update, update management systems and also as direct downloads from Microsoft's website.

Our monthly overview of the windows security updates is created as a resource for system administrators and home users alike. It lists important information about the Patch Day and the released patches, links to support pages, lists all known issues and other released updates, and includes download information and more resource links.

You can open the August 2023 Patch Day overview here.

Microsoft Windows Security Updates: September 2023

Here is a link to an Excel spreadsheet that lists information about the released security updates on the September 2023 Microsoft Patch Day. Activate the following link to download an archive file that contains the spreadsheet: microsoft windows security updates september 2023

Executive Summary

• Windows 11 version 21H2, the release version of Windows 11, will run out of support in October 2023. Microsoft will enforce updates.
  
• Microsoft patched a total of 59 Microsoft and 6 non-Microsoft CVEs on this patch day.
  
• The following Windows client version have known issues: None!
  
• The following Windows server versions have known issues: Windows Server 2008 and 2008 R2, Windows Server 2022.
  
• Other company products with updates include 3D Viewer, Microsoft Exchange Server, Microsoft Office. .NET and Visual Studio, and Microsoft Edge.
  

The critical vulnerabilities are linked below only.

• Windows 10 version 22H2: 16 vulnerabilities, 1 critical and 15 important.
  • Internet Connection Sharing (ICS) Remote Code Execution Vulnerability -- CVE-2023-38148
    
• Windows 11 version 21H2:  18 vulnerabilities, 1 critical and 17 important
  • Internet Connection Sharing (ICS) Remote Code Execution Vulnerability -- CVE-2023-38148
    
• Windows 11 version 22H2:  17 vulnerabilities, 1 critical and 16 important
  • Internet Connection Sharing (ICS) Remote Code Execution Vulnerability -- CVE-2023-38148
    

Windows Server products

• Windows Server 2008 R2 (extended support only): 11 vulnerabilities: 0 critical and 11 important
  
• Windows Server 2012 R2: 13 vulnerabilities: 0 critical and 13 important
  
• Windows Server 2016: 16 vulnerabilities: 0 critical and 16 important
  
• Windows Server 2019: 18 vulnerabilities: 0 critical and 18 important
  
•  Windows Server 2022: 19 vulnerabilities: 1 critical and 18 important.
  • Internet Connection Sharing (ICS) Remote Code Execution Vulnerability -- CVE-2023-38148
    

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