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CVE-2026-21533: Microsoft Windows Improper Privilege Management Vulnerability
Microsoft Windows · in CISA KEV since 2026-02-10
2026-02-10added to KEV
2026-03-03federal remediation due date
3.91%EPSS exploit probability (30 days) 89.9th percentile
7.8 HIGHCVSS 3.1
Unknownknown ransomware use
0days from NVD publication to KEV
What it is
Microsoft Windows Remote Desktop Services contains an improper privilege management vulnerability that could allow an authorized attacker to elevate privileges locally.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-269 |
|---|---|
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2026-02-10 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2026-21533.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.