August 8, 2023-KB5028948 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2

Summary

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

There are no new Quality and Reliability Improvements in this update.

Known issues in this update

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

How to get this update

Install this update

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.

File information

For a list of the files that are provided in this update, download the file information for cumulative update.

Prerequisites

To apply this update, you must have .NET Framework 3.5 or 4.8.1 installed.

Restart requirement

You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.

How to obtain help and support for this update

• Help for installing updates: Windows Update FAQ

• Protect yourself online and at home: Windows Security support

• Local support according to your country: International Support