The last Windows security updates of 2025 are here

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It is December 2025 already and Microsoft has released the last security updates of the year for its Windows operating system just a moment ago. The updates are available for all supported versions of Windows, including Windows 10, which is on life-support already with extended support releases.

Our weekly overview provides home users and system administrators with actionable information. While it depends on Microsoft to a large margin, it gives a quick overview of the updates that Microsoft released, the severity of security issues and more. It also links to support pages and downloads, and lists all confirmed issues by Microsoft.

As announced last month already, Windows 11, version 23H2 Home and Pro editions do not receive updates anymore. Users should be able to update to a newer version of Windows 11 to continue receiving updates.

Microsoft Windows Security Updates: December 2025

You may download the following Excel spreadsheet to get a list of released updates. Click on the following link to download the archive to the local device: Windows security updates December 2025

Executive Summary

• Microsoft released a total of 57 security updates for various Microsoft products and 13 security update for non-Microsoft issues (e.g. Chromium).
  
• No critical issues for Windows client and server systems according to Microsoft.
  
• Windows clients with issues:
  • Windows 10: none
    
  • Windows 11: 24H2 and 25H2
    
• Windows Server clients with issues:
  • Windows Server 2008, 23H2, 2022, 2025
    

Product overview

Each supported version of Windows and their critical vulnerabilities are listed below.

• Windows 10 version 22H2: 31 vulnerabilities, 0 critical, 31 important
  • No critical vulnerabilities.
    
• Windows 11 version 24H2: 36 vulnerabilities, 0 critical, 36 important
  • No critical vulnerabilities.
    
• Windows 11 version 25H2: 36 vulnerabilities, 0 critical, 36 important
  • No critical vulnerabilities.
    

Windows Server products

• Windows Server 2008 R2 (extended support only): 11 vulnerabilities: 0 critical,  11 important
  • No critical vulnerabilities.
    
• Windows Server 2016: 18 vulnerabilities: 0 critical, 18 important
  • No critical vulnerabilities.
    
• Windows Server 2019: 29 vulnerabilities: 0 critical, 29 important
  • No critical vulnerabilities.
    
• Windows Server 2022: 32 vulnerabilities: 0 critical, 32 important
  • No critical vulnerabilities.
    
• Windows Server 2025:  36 vulnerabilities: 0 critical, 36 important
  • No critical vulnerabilities.
    

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