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CVE-2021-36934: Microsoft Windows SAM Local Privilege Escalation Vulnerability
Microsoft Windows · in CISA KEV since 2022-02-10
2022-02-10added to KEV
2022-02-24federal remediation due date
67.25%EPSS exploit probability (30 days) 99.3th percentile
7.8 HIGHCVSS 3.1
Unknownknown ransomware use
203days from NVD publication to KEV
What it is
If a Volume Shadow Copy (VSS) shadow copy of the system drive is available, users can read the SAM file which would allow any user to escalate privileges to SYSTEM level.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-1220 |
|---|---|
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2021-07-22 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-36934.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.