CVE-2026-21533
Microsoft Windows Improper Privilege Management Vulnerability
CVSS
—
No CVSS
EPSS
4.1%
p91
KEV
YES
Feb 10, 2026
Exploit Today
77
0-100
Published: — · Last modified: —
Product
Microsoft / Windows
Vulnerability
Microsoft Windows Improper Privilege Management Vulnerability
Added to KEV
Feb 10, 2026
Remediate by
Mar 3, 2026
Known ransomware use
No
Summary description
Microsoft Windows Remote Desktop Services contains an improper privilege management vulnerability that could allow an authorized attacker to elevate privileges locally.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21533 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21533