Exchange 2019, 2016 and 2013 Security Updates for April 2021

Security updates have been released for Exchange 2013, Exchange 2016 and Exchange 2019.

The updates fixes the following Remote Code Execution Vulnerabilities;

None of the vulnerabilities are currently publicly disclosed nor exploited. The Exploitability Assessment is rated: Exploitation More Likely.

View: Exchange Blog: Released: April 2021 Exchange Server Security Updates
View: Microsoft Security Response Center (MSRC) Blog: April 2021 Update Tuesday packages now available
View: Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: April 13, 2021 (KB5001779)

Download: Security Update for Exchange 2019 CU8 and CU9
Download: Security Update for Exchange 2016 CU19 and CU20
Download: Security Update for Exchange 2013 CU23