Microsoft Active Directory Domain Services Privilege Escalation Vulnerability

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Nov 9, 2021 · Catalog

   Detected

   Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.

2. Apr 11, 2022 · CISA KEV

   Known exploited

   Apply updates per vendor instructions.

3. May 2, 2022 · CISA KEV

   Remediation due

   Apply updates per vendor instructions.

4. Aug 19, 2026 · Catalog

   Updated

   Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.

Affected

• cpe microsoft/windows server 2004version unspecified
• cpe microsoft/windows server 2008version unspecified
• cpe microsoft/windows server 2008r2
• cpe microsoft/windows server 2012version unspecified
• cpe microsoft/windows server 2012r2
• cpe microsoft/windows server 2016version unspecified
• cpe microsoft/windows server 2019version unspecified
• cpe microsoft/windows server 2022version unspecified
• vendor Microsoft Active Directoryversion unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2021-42278

  Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-42278

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-42278

  30-day exploitation probability 73.3%

  first.org
• NIST NVDVulnerability recordCVE-2021-42278

  Active Directory Domain Services Elevation of Privilege Vulnerability

  nvd.nist.gov

References

• Patch · msrc.microsoft.com
• CISA note · nvd.nist.gov
• Patch · portal.msrc.microsoft.com
• US Government Resource · cisa.gov