Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 74.3%; technical severity is CVSS 7.5.
Active Directory Domain Services Elevation of Privilege Vulnerability
Who should care
- Teams operating Active Directory, Windows Server 2004, Windows Server 2008 +5 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Active Directory, Windows Server 2004, Windows Server 2008 +5 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Apply updates per vendor instructions.
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Vendor remediation
Patch and remediation links
Use the vendor source below to confirm the correct fixed version, package or mitigation for your affected product.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-269
- Affected versions
- Microsoft Active Directory; Microsoft Windows Server 2004 (End Excluding: 10.0.19041.1348); Microsoft Windows Server 2008 (Version: r2); Microsoft Windows Server 2012 (Version: r2); Microsoft Windows Server 2016 (End Excluding: 10.0.14393.4770); Microsoft Windows Server 2019 (End Excluding: 10.0.17763.2300); Microsoft Windows Server 2022 (End Excluding: 10.0.20348.350); Microsoft Windows Server 20h2 (End Excluding: 10.0.19042.1348)
- Published
- 10 November 2021
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 74.3%
- Signal calculated at 83