CVE-2021-38665: Microsoft Remote Desktop Client

High severity, CVSS 7.4. EPSS: 7% chance of exploitation in the next 30 days.

Remote Desktop Protocol Client Information Disclosure Vulnerability

Affected products

• Microsoft Remote Desktop Client: from 1.2.1672, before 1.2.2677 (fixed in 1.2.2677)
• Microsoft Windows 10: affected versions not specified; version 20h2 only; version 21h1 only; version 1607 only; version 1809 only; version 1909 only; …
• Microsoft Windows 11: affected versions not specified
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Rt 8.1: affected versions not specified
• Microsoft Windows Server 2008: version r2 only
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: affected versions not specified
• Microsoft Windows Server 2019: affected versions not specified
• Microsoft Windows Server 2022: affected versions not specified

Published 2021-11-10. Last modified 2026-08-19.