CVE-2021-31198: Microsoft Exchange Server

High severity, CVSS 7.8. EPSS: 4.9% chance of exploitation in the next 30 days.

Microsoft Exchange Server Remote Code Execution Vulnerability

Affected products

• Microsoft Exchange Server: version 2013 only; version 2016 only; version 2019 only

Published 2021-05-11. Last modified 2026-06-17.