A quick update to keep everyone informed on important Microsoft Exchange security updates:
April 13, 2021 – Microsoft released new and urgent security updates for Exchange server 2019, 2016, 2013 covering four Remote Code vulnerabilities:
- CVE-2021-28480 – https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28480
- CVE-2021-28481 – https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28481
- CVE-2021-28482 – https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28482
- CVE-2021-28483 – https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28483
More information on the Exchange security update can be found in Microsoft knowledgebase article KB5001779:
These updates are available via:
- Microsoft Update Service
- Microsoft Download Center (take care to run a command prompt with elevated permissions for manual installs)
- Download Security Update For Exchange Server 2019 Cumulative Update 9 (KB5001779)
- Download Security Update For Exchange Server 2019 Cumulative Update 8 (KB5001779)
- Download Security Update For Exchange Server 2016 Cumulative Update 20 (KB5001779)
- Download Security Update For Exchange Server 2016 C
umulative Update 19 (KB5001779) - Download Security Update For Exchange Server 2013 Cumulative Update 23 (KB5001779)
We have not encountered any issues with installing the Microsoft Security Updates. We suggest that you proceed with applying the patches if you have not already. If you encounter any post-install issues, please email to create a priority support ticket by emailing us at support@messageware.com