CVE-2023-21707: Microsoft Exchange Server

High severity, CVSS 8.8. EPSS: 82% 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 2023-02-14. Last modified 2026-08-19.