CVE-2026-21533

high-risk
Published 2026-02-10

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

Do I need to act?

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22.7% chance of exploitation in next 30 days
EPSS score — higher than 77% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (20)

Affected Vendors

Microsoft

References (4)

Vendor Advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21533
Third Party Advisory https://www.vicarius.io/vsociety/posts/cve-2026-21533-detection-script-privilege...
Mitigation https://www.vicarius.io/vsociety/posts/cve-2026-21533-mitigation-script-privileg...
US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-...
66
/ 100
high-risk
Severity 24/34 · High
Exploitability 21/34 · High
Exposure 21/34 · High