CVE-2026-21533

high

Description

Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21533

https://cyberscoop.com/microsoft-patch-tuesday-february-2026/

https://www.tenable.com/blog/microsofts-february-2026-patch-tuesday-addresses-54-cves-cve-2026-21510-cve-2026-21513

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21533

Details

Source: Mitre, NVD

Published: 2026-02-10

Updated: 2026-02-10

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High