CVE-2021-36934
악용 확인 Microsoft Windows SAM Local Privilege Escalation Vulnerability
악용 여부
악용 확인
심각도 (발행처 발표값)
높음7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
악용 확률 (EPSS)
67.3%
한국어 공식 권고
CISA 원문
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 KEV · shortDescription 원문
Apply updates per vendor instructions.— CISA KEV · requiredAction 원문
취약점 설명 (NVD 원문)
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.
악용 확률 변화
| 기준일 | 확률 | 백분위 |
|---|---|---|
| 2026-09-06 | 67.25% | 99.3% |
| 2026-09-05 | 67.25% | 99.3% |
| 2026-09-04 | 67.25% | 99.3% |