The October 10, 2023 update for Windows 11, version 22H2 and Windows 11, version 23H2 includes 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.

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

This article describes the security and Cumulative Update for 3.5 and 4.8.1 for Windows 11, version 22H2. 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.

Starting in August, 2019, updates to .NET Framework 4.6 and above, for Windows Server 2008 SP2, Windows Server 2008 R2 SP1, and Windows 7SP1, require SHA-2 Code signing support. Please make sure that you have all the latest Windows Updates before applying this update to avoid installation issues.

The .NET Framework servicing update released on July 2024 security and quality rollup - .NET Framework contains a security fix addressed an elevation of privilege vulnerability detailed in CVE 2024-38081. The fix changed System.IO.Path.GetTempPath method return value.

.NET 6.0 has been refreshed with the latest update as of August 13, 2024. This update contains both security and non-security fixes. See the release notes for details on updated packages.

This article describes the security and cumulative update for 3.5, 4.8 and 4.8.1 for Windows 10 Version 22H2. Security Improvements CVE-2023-36042 – .NET Framework Denial of Service Vulnerability

In these cases, support for stand-alone installations of the .NET Framework 3.0 has expired. However, Microsoft will provide support for the .NET Framework 2.0 and .NET Framework 3.0 components for customers who install the .NET Framework 3.5 for as long as the .NET Framework 3.5 remains in support.

To resolve the issue, install update 3005628. To work around this issue, use one of the following workarounds, as appropriate for your situation: Turn on the Microsoft .NET Framework 3.5 feature before you install security update 2966827 or 2966828.

Microsoft has released update 3005628 for the .NET Framework 3.5 on Windows 8, Windows Server 2012, Windows 8.1, and Windows Server 2012 R2. Individual, small-business, and organizational users should use the Windows automatic-updating feature to install the fixes from Microsoft Update.