Release Date:September 13, 2022

Version:.NET Framework 3.5 and 4.8

The September 13, 2022 update for Windows 10, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2 includes cumulative reliability improvements in .NET Framework 3.5 and 4.8. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.

Summary

Security Improvements

This security update addresses an issue where an attacker could convince a local user to open a specially crafted file which could execute malicious code on an affected system. For more information please see CVE-2022-26929.

Quality and Reliability Improvements

Runtime

- Addresses an issue regarding integer overflow exception in System.Windows.Forms.InputLanguage class.

Additional information about this update

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

  • 5017499 Description of the Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 10 Version 21H1 (KB5017499)

  • 5017500 Description of the Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 10 Version 21H2 (KB5017500)

  • 5017498 Description of the Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 10, version 20H2 (KB5017498)

Known issues in this update

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

How to get this update

Install 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 update will automatically sync with WSUS if you configure Products and Classifications as follows:

Product: Windows 10, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2

Classification: Security Updates

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 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

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