As a reminder to advanced IT administrators, updates to .NET Framework 3.5 for Windows Server 2012 R2 should only be applied on systems where .NET Framework 3.5 is present and enabled. Customers who attempt to pre-install updates to .NET Framework 3.5 to offline images that do not contain the .NET Framework 3.5 product enabled will expose these ...

5021091 Description of the Security and Quality Rollup for .NET Framework 3.5.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB5021091) Known issues in this update Symptom. After installing this update, WPF apps may have a change in behavior.

There are no new Quality and Reliability Improvements in this update. Additional information about this update. The following articles contain additional information about this update as it relates to individual product versions. 5031228 Description of the Security and Quality Rollup for .NET Framework 3.5, 4.6.2, ...

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.

Customers who attempt to pre-install updates to .NET Framework 3.5 to offline images that do not contain the .NET Framework 3.5 product enabled will expose these systems to failures to enable .NET Framework 3.5 after the systems are online.

Quality and Reliability Improvements WPF - Addresses an issue where XPS documents using LinkTarget aren't rendering properly. Networking - Addresses an issue where using proxy with continuous load may lead to memory leak resulting in high memory usage, or potentially OutOfMemoryException. ...

5034279 Description of the Security and Quality Rollup for .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Server 2012 R2 (KB5034279) Known issues in this update Microsoft is not currently aware of any issues in this update. How to get this update.

5016268 Description of the Security and Quality Rollup for .NET Framework 3.5 for Windows 8.1, RT 8.1, and Windows Server 2012 R2 (KB5016268) 5018523 Description of the Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 8.1, RT 8.1, and Windows Server 2012 R2 (KB5018523)

Quality and Reliability Improvements . ASP.NET - Addresses an issue with JavaScriptSerializer where after installing the January Security and Quality update there is a performance degradation. CLR 1 - Addresses an issue with thread pool recycled lists become unresponsive on multi-CPU-group computers.

REMINDER Windows 7, Windows Server 2008 R2, Windows Embedded Standard 7, and Windows Embedded POS Ready 7 have reached the end of mainstream support and are now in extended security update (ESU) support. Windows Thin PC has reached the end of mainstream support; however, ESU support is not available. Starting in July 2020, there will no longer be optional, non-security releases (known as "C ...