Microsoft has released servicing stack update (SSU) 5001205 for Windows 10 version 1909. 

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Title: Microsoft Security Advisory Notification
Issued: April 7, 2021
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Security Advisories Released or Updated on April 7, 2021
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* ADV990001

 - ADV990001 | Latest Servicing Stack Updates
 - https://msrc.microsoft.com/update-guide/vulnerability/ADV990001
 - Reason for Revision: Microsoft has released servicing stack update (SSU) 5001205
   for all affected editions of Windows 10 version 1909. This SSU also addresses known 
   issues customers might have experienced when installing the update for CVE-2020-0689;
   see [KB5001205](https://support.microsoft.com/help/5001205). Customers must install
   the latest SSU before installing applicable security updates. See the FAQ for more
   information.
 - Originally posted: November 13, 2018
 - Updated: April 7, 2021
 - Version: 35.0