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
- 99.9th percentile (score 0.940, as of
2026-06-08) - NVD CVSS v3.1
- —
- 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.