Here's a brief overview of the patch:
KB4571694 (also known as CVE-2020-1333) Release Date: September 8, 2020 Affected Systems: Windows Server 2019, Windows 10 (versions 1809, 1903, 1909, and 2004) windows server 2019 termsrvdll patch top
You're looking for information on a specific patch related to the termsrv.dll file in Windows Server 2019. Here's a brief overview of the patch: KB4571694