CVE-2020-16875: Microsoft Exchange Server

High severity, CVSS 8.4. EPSS: 47.4% chance of exploitation in the next 30 days.

<p>A remote code execution vulnerability exists in Microsoft Exchange server due to improper validation of cmdlet arguments.</p> <p>An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the System user. Exploitation of the vulnerability requires an authenticated user in a certain Exchange role to be compromised.</p> <p>The security update addresses the vulnerability by correcting how Microsoft Exchange handles cmdlet arguments.</p>

Affected products

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

Published 2020-09-11. Last modified 2026-06-17.