April 11, 2022 · Applied Cybernetics Group
CVE-2021-42287 — Microsoft Active Directory
known ransomware use
Microsoft Active Directory Domain Services Privilege Escalation Vulnerability
- Added to KEV
2022-04-11- Federal due date
2022-05-02- Vendor
- Microsoft
- Product
- Active Directory
- EPSS
- 99.5th percentile (score 0.772, as of
2026-09-16) - NVD CVSS v3.1
- 7.5 (HIGH)
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-42287
CISA short description
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
Required action
Apply updates per vendor instructions.
NVD description
Active Directory Domain Services Elevation of Privilege Vulnerability