Win Update KB5029650 Cumulative Update .NET Framework 3.5, 4.8, and 4.8.1 (21H2)

August 8, 2023 - KB5029650 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 11, version 21H2​

Summary​

This article describes the security and Cumulative Update for 3.5, 4.8 and 4.8.1 for Windows 11, version 21H2.

Security Improvements

CVE-2023-36899 - .NET Framework Remote Code Execution Vulnerability
This security update addresses a vulnerability in applications on IIS using their parent application’s Application Pool which can lead to privilege escalation or other security bypasses. For more information see CVE 2023-36899.

CVE-2023-36873 - .NET Framework Spoofing Vulnerability
This security update addresses a vulnerability where unauthenticated remote attacker can sign ClickOnce deployments without a valid code signing certificate. For more information see CVE-2023-36873.

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.

• 5028954 Description of the Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 11, version 21H2 (KB5028954)
• 5028947 Description of the Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 21H2 (KB5028947)

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, version 21H2 Classification: Security Updates

Click to expand...

August 8, 2023-KB5029650 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 11, version 21H2 - Microsoft Support

support.microsoft.com

.NET Framework August 2023 Security and Quality Rollup Updates - .NET Blog

August 2023 Security and Quality Rollup Updates for .NET Framework

devblogs.microsoft.com