Microsoft November 2021 Security Updates

     

The Microsoft November 2021 security updates have been released and consist of 55 CVEs.  Of these CVEs, 6 are rated Critical, and 49 are rated Important severity.  At the time of release, four listed as publicly known and two are listed as under active exploit.

The updates apply to the following long list of products:  3D Viewer, Azure, Azure RTOS, Azure Sphere, Microsoft Dynamics, Microsoft Edge (Chromium-based), Microsoft Edge (Chromium-based) in IE Mode, Microsoft Exchange Server, Microsoft Office, Microsoft Office Access, Microsoft Office Excel, Microsoft Office SharePoint, Microsoft Office Word, Microsoft Windows, Microsoft Windows Codecs Library, Power BI, Role: Windows Hyper-V, Visual Studio, Visual Studio Code, Windows Active Directory, Windows COM, Windows Core Shell, Windows Cred SSProvider Protocol, Windows Defender, Windows Desktop Bridge, Windows Diagnostic Hub, Windows Fastfat Driver, Windows Feedback Hub, Windows Hello, Windows Installer, Windows Kernel, Windows NTFS, Windows RDP, Windows Scripting, and Windows Virtual Machine Bus.

See the KBs listed at November 2021 Security Updates - Release Notes - Security Update Guide - Microsoft for information regarding known issues with the security updates as well as the CVEs with FAQs, Mitigations and/or Workarounds.

Recommended Reading:   See Dustin Childs review and analysis in Zero Day Initiative -- The November 2021 Security Update Review.

 

Additional Update Notes:

• MSRT -- The Malicious Software Removal Tool is now run on a quarterly basis rather than monthly.  See Remove specific prevalent malware with Windows Malicious Software Removal Tool. 
• Servicing Stack Updates -- Microsoft now combines the latest servicing stack update (SSU) for your operating system with the Latest Cumulative Updates (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.
  
• Windows updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows, in addition to non-security updates. The updates are also available via search for the KB number in the Microsoft Update Catalog.
• For information on lifecycle and support dates for Windows 10 and Windows 11 operating systems, please see Windows 10 Home and Pro - Microsoft Lifecycle | Microsoft Docs and Windows 11 Home and Pro (Version 21H2) - Microsoft Lifecycle | Microsoft Docs.
• Windows Update History:
• Windows 11
• Windows 10
• Windows 8.1

 

References

• Security Update FAQ
• Security Updates Guide

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