Vulnerability in Microsoft Windows Server 2004
CVE-2021-42287
Active Directory Domain Services Elevation of Privilege Vulnerability
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: 0.772 (99.6th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.772 · newest: 0.772 · change: 0.000
Affected products
- Microsoft Windows Server 2004
- 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 — versions r2
- Microsoft Windows Server 2012 R2 — versions 6.3.0
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
- msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42287 (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-42287?
- CVE-2021-42287 is a high-severity vulnerability in Microsoft Windows Server 2004. CVSS score: 7.5/10. Published 2021-11-10.
- How severe is CVE-2021-42287?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-42287 known to be exploited?
- Yes. CVE-2021-42287 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-04-11), indicating it is being actively exploited. 189 public proof-of-concept repositories are indexed.