Microsoft released KB4601050 Cumulative Update for .NET Framework 3.5 and 4.8 to the public.
This update supports Windows 10, version 2004, Windows Server, version 2004, Windows 10, version 20H2, and Windows Server, version 20H2.
A security issue has been identified in the last release and can be fixed by installing this update.
This security update addresses a denial of service vulnerability in .NET Framework. For more information please see CVE-2021-24111.