September 20, 2022-KB5017856 Cumulative Update Preview for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 10, version 20H2

Summary

This article describes the Cumulative Update for 3.5, 4.8 and 4.8.1 for Windows 10, version 20H2.

Security Improvements

There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements.

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

The September 2022 preview release is listed in Windows Server Update Services
IT Administrators who utilize Windows Server Update Services (WSUS) might notice that this KB is listed among the updates available from WSUS. This listing is an error. Preview updates are generally only available for manual importing via to the Microsoft Update Catalog.

Home users of Windows are unlikely to experience this issue. WSUS is commonly utilized by technology administrators to deploy Microsoft product updates in managed environments.

Please note: In environments where WSUS is configured to auto-approve updates and also auto-decline superseded content, the .NET Framework September 2022 Security and Quality Rollup Update may subsequently be auto-decline and auto-expired from the client view. If this occurs, see the guidance for reinstating declined updates. Then, run an update synchronization within Microsoft Endpoint Configuration Manager, or update management environments. Environments configured to only take security updates should not reflect these symptoms.

Next steps: The September 2022 preview release is being removed from WSUS and we are working on a resolution to support customers who received these updates via WSUS inadvertently. We estimate a solution will be available in the coming days.

Additional information about this update

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

• 5017262 Description of the Cumulative Update Preview for .NET Framework 3.5 and 4.8 for Windows 10, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2 (KB5017262)

• 5017266 Description of the Cumulative Update Preview for .NET Framework 3.5 and 4.8.1 for Windows 10, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2 (KB5017266)

How to get 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