CVE-2021-31205: Microsoft Windows 10

Medium severity, CVSS 6.5. EPSS: 2.9% chance of exploitation in the next 30 days.

Windows SMB Client Security Feature Bypass Vulnerability

Affected products

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

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