The September 8, 2026 update for Windows 11, version 24H2, Windows 11, version 25H2 and Microsoft server operating system 24H2 includes security and cumulative reliability improvements in .NET Framework 3.5 and 4.8.1. We recommend that you apply this update as part of your regular maintenance routines.

Download the Microsoft .NET Framework 4.8 offline installer package now. For Windows RT 8.1: Download the Microsoft .NET Framework 4.8 package now. For more information about how to download Microsoft support files, see How to obtain Microsoft support files from online services . Virus Scan Claim: Microsoft scanned this file for viruses.

October 13, 2026-KB5128923 Cumulative Update for .NET Framework 3.5, 4.7.2 and 4.8 for Windows 10, version 1809 and Windows Server 2019

Microsoft .NET Framework 4.8.1 is a highly compatible and in-place update to .NET Framework 4.8. It includes native support for the Arm64 architecture (Windows 11+), accessibility improvements as well as other improvements. For a complete list of improvements see: .NET Framework 4.8.1 release notes.

Describes the .NET Framework 4.7.1 offline installer for Windows 7 SP1, Windows 8.1, Windows 10 Anniversary Update, Windows 10 Creators Update, Windows Server 2008 R2 SP1, Windows Server 2012, Windows Server 2012 R2 and Windows Server 2016.

Describes the .NET Framework 4.6.2 web installer for Windows 7 SP1, Windows 8.1, Windows 10 (version 1507), Windows 10 November Update (version 1511), Windows 10 Anniversary Update (version 1607), Windows Server 2008 R2 SP1, Windows Server 2012, and Windows Server 2012 R2.

April 14, 2026-KB5082417 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 25H2 and Microsoft server operating system 24H2

October 13, 2026-KB5128924 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 10 Version 21H2

CVE-2025-21176 - .NET Framework Remote Code Execution vulnerability This security update addresses a remote code execution vulnerability detailed in CVE-2025-21176. 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.

This article describes the Microsoft .NET Framework 4.7 offline installer for Windows 7 Service Pack 1 (SP1), Windows 8.1, Windows 10 Anniversary Update (Version 1607), Windows Server 2016, Windows Server 2008 R2 SP1, Windows Server 2012, and Windows Server 2012 R2.