CVE-2021-36934
91.5
RPSRPS range: 0–105; KEV-listed vulnerabilities can receive an exploitation amplifier.
Description
An elevation of privilege vulnerability exists because of overly permissive Access Control Lists (ACLs) on multiple system files, including the Security Accounts Manager (SAM) database. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. An attacker must have the ability to execute code on a victim system to exploit this vulnerability. After installing this security update, you must manually delete all shadow copies of system files, including the SAM database, to fully mitigate this vulnerabilty. Simply installing this security update will not fully mitigate this vulnerability. See KB5005357- Delete Volume Shadow Copies.
Source: NVD
Signals
- CVSS
- 7.8
- High · v3.1
- EPSS
- 67.25%
- Probability of exploitation in the next 30 days (FIRST)
- CISA KEV
- In CISA KEV since Feb 2022
- Fix commit
- No known fix commit
- Sources: MoreFixes, FreshFixes
- Weakness
- Not mapped
- Published
- 22 Jul 2021
- Last modified 10 Aug 2026
How to read these signals: RPS · EPSS · CISA KEV · Data sources
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Data as of 7 Oct 2026, 05:16 UK time