CVE-2021-26431: Microsoft Windows 10

High severity, CVSS 7.8. EPSS: 1.2% chance of exploitation in the next 30 days.

Windows Recovery Environment Agent Elevation of Privilege Vulnerability

Affected products

• Microsoft Windows 10: version 20h2 only; version 21h1 only; version 2004 only
• Microsoft Windows Server 2016: version 20h2 only; version 2004 only

Published 2021-08-12. Last modified 2026-08-10.