CVE-2021-42278
Microsoft Active Directory Domain Services Privilege Escalation Vulnerability
Published Nov 9, 2021 · updated Aug 19, 2026 · microsoft windows server 2004
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
Timeline
Detection, updates, and resolution for this record.
Nov 9, 2021 · Catalog
Detected
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
Apr 11, 2022 · CISA KEV
Known exploited
Apply updates per vendor instructions.
May 2, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Aug 19, 2026 · Catalog
Updated
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
Required action
Apply updates per vendor instructions.
CISA due date May 2, 2022
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 KEVCVE-2021-42278
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
cisa.gov - CVE.orgCVE-2021-42278
Official CVE identifier
cve.org - FIRST EPSSCVE-2021-42278
30-day exploitation probability 73.3%
first.org - NIST NVDCVE-2021-42278
Active Directory Domain Services Elevation of Privilege Vulnerability
nvd.nist.gov