February 10, 2026 · Applied Cybernetics Group
CVE-2026-21533 — Microsoft Windows
Microsoft Windows Improper Privilege Management Vulnerability
- Added to KEV
2026-02-10- Federal due date
2026-03-03- Vendor
- Microsoft
- Product
- Windows
- EPSS
- 88.9th percentile (score 0.038, as of
2026-07-13) - NVD CVSS v3.1
- 7.8 (HIGH)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2026-21533
CISA short 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.
NVD description
Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.