Win Update KB5021090 Cumulative Update .NET Framework 3.5, 4.8, and 4.8.1 (21H2) - Dec. 13

December 13, 2022 - KB5021090 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 11​

Summary​

This article describes the Cumulative Update for 3.5, 4.8 and 4.8.1 for Windows 11.

Security Improvements

This security update addresses a vulnerability where restricted mode is triggered for the parsing of XPS files, preventing gadget chains which could allow remote code execution on an affected system. For more information please see CVE-2022-41089.

Quality and Reliability Improvements

For a list of improvements that were released with this update, please see the article links in the Additional Information section of this article.

Known issues in this update​

Symptom	After installing this update, WPF apps may have a change in behavior. For more information about this issue, see KB5022083
Workaround	To mitigate this issue, see KB5022083.

Additional information about this update​

The following articles contain additional information about this update as it relates to individual product versions.

• 5020875 Description of the Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 11 (KB5020875)
• 5020882 Description of the Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11 (KB5020882)

How to get this update​

Release Channel	Available	Next Step
Windows Update and Microsoft Update	Yes	None. This update will be downloaded and installed automatically from Windows Update.
Windows Update for Business	Yes	None. This update will be downloaded and installed automatically from Windows Update.
Microsoft Update Catalog	Yes	To get the standalone package for this update, go to the Microsoft Update Catalog website.
Windows Server Update Services (WSUS)	Yes	This operating system update will offer, as applicable, and individual .NET Framework product updates will be installed. For more information about individual .NET Framework product updates see additional information about this update section. This update will automatically sync with WSUS if you configure as follows: Product: Windows 11 Classification: Security Updates

Click to expand...

December 13, 2022-KB5021090 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 11 - Microsoft Support

support.microsoft.com

.NET Framework December 2022 Security and Quality Rollup Updates - .NET Blog

December 2022 Security and Quality Rollup Updates for .NET Framework

devblogs.microsoft.com