Microsoft Defender published security updates on 19th March 2021, addressing vulnerabilities in the following products. It is recommended that you take the necessary precautions by ensuring your products are always updated.
Windows 10 (Enterprise, Pro, and Home editions)
Windows Server 2019
Windows Server 2016
For more information on these Microsoft Defender updates, you can follow the URL:
The Guyana National CIRT recommends that users and administrators review these updates and apply them where necessary.
PDF Download: Microsoft Defender Security Updates.pdf
References
Microsoft Defender update for Windows operating system installation images Retrieved from Microsoft Support
https://www.microsoft.com/en-us/wdsi/defenderupdates
E. Kovacs (19th March 2021) Microsoft Defender Antivirus Now Protects Users Against Ongoing Exchange Attacks. Retrieve from Security Week