Microsoft Windows SAM Local Privilege Escalation Vulnerability (CVE-2021-36934)
Severity: high · Patch status: patched · Since 2022-02-10 · CVE-2021-36934
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. CISA added CVE-2021-36934 to its Known Exploited Vulnerabilities catalog on Feb 10, 2022, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Feb 24, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
