Privilege escalation in Microsoft Windows Server
CVE-2021-42291
Active Directory Domain Services Elevation of Privilege Vulnerability
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.042 (90.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.042 · newest: 0.042 · change: 0.000
Affected products
- Microsoft Windows Server — versions 20h2, 2012
- Microsoft Windows Server 2008 — versions r2
- Microsoft Windows Server 2008 R2 Service Pack 1 — versions 6.1.0
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core Installation) — versions 6.0.0
- Microsoft Windows Server 2008 Service Pack 2 — versions 6.0.0
- Microsoft Windows Server 2008 Service Pack 2 — versions 6.0.0
- Microsoft Windows Server 2008 Service Pack 2 (Server Core Installation) — versions 6.0.0
- Microsoft Windows Server 2012 — versions 6.2.0
- Microsoft Windows Server 2012
- Microsoft Windows Server 2012 R2 — versions 6.3.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
- msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42291 (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2021-42291?
- CVE-2021-42291 is a high-severity vulnerability in Microsoft Windows Server, classified under Improper Privilege Management. CVSS score: 7.5/10. Published 2021-11-10.
- How severe is CVE-2021-42291?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-42291 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.