December 13, 2022-KB5021095 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows Server 2022

2022-12-1308:00:00

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December 13, 2022-KB5021095 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows Server 2022

Release Date:
December 13, 2022 Version: ** .NET Framework 3.5, 4.8 and 4.8.1**

**Note:**Revised on Jun 20, 2023 to add resolution to known issue.

Summary

This article describes the Cumulative Update for 3.5, 4.8 and 4.8.1 for Windows Server 2022. 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 ImprovementsFor 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. Resolution

Additional information about this update

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

5020877 Description of the Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2022 (KB5020877)
5020883 Description of the Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows Server 2022 (KB5020883)

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: Microsoft server operating system version 21H2Classification: Security Updates