September 12, 2023-KB5031217 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2

適用先
.NET

Note

Revised July 7, 2025: Updated 'How to get this update' section.

Note

  • Release Date:
    September 12, 2023
  • Version:
    .NET Framework 3.5 and 4.8.1

Summary

This article describes the security and Cumulative Update for 3.5 and 4.8.1 for Windows 11, version 22H2.

Security Improvements

CVE-2023-36796 - .NET Framework Remote Code Execution Vulnerability
              This security update addresses a vulnerability in DiaSymReader.dll when reading a corrupted PDB file which can lead to Remote Code Execution. For more information see CVE 2023-36796.

CVE-2023-36792 - .NET Framework Remote Code Execution Vulnerability
                This security update addresses a vulnerability in DiaSymReader.dll when reading a corrupted PDB file which can lead to Remote Code Execution. For more information see CVE-2023-36792.

CVE-2023-36793 - .NET Framework Remote Code Execution Vulnerability
              This security update addresses a vulnerability in DiaSymReader.dll when reading a corrupted PDB file which can lead to Remote Code Execution. For more information see CVE-2023-36793.

CVE-2023-36794 - .NET Framework Remote Code Execution Vulnerability
              This security update addresses a vulnerability in DiaSymReader.dll when reading a corrupted PDB file which can lead to Remote Code Execution. For more information see CVE-2023-36794.

CVE-2023-36788 - .NET Framework Remote Code Execution Vulnerability
              This security update addresses a vulnerability in the WPF XAML parser where an unsandboxed parser can lead to remote code execution. For more information see CVE 2023-36788.

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

Microsoft is not currently aware of any issues in this update.

Additional information about this update

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

  • 5029921 Description of the Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2 (KB5029921)

How to get this update

Release Channel Available Next Step
Windows Update and Microsoft Update No See note
Windows Update for Business No See note
Microsoft Update Catalog No See note
Windows Server Update Services (WSUS) No See note

Note: This update is no longer available. At this time, no functional issues have been reported with this update. To ensure your device continues to receive the latest security updates and quality improvements, we recommend installing the most recent cumulative update.

How to obtain help and support for this update