CVEvulnerability
CVE-2021-42278
CISA Known Exploited Vulnerability
Microsoft Active Directory Domain Services Privilege Escalation Vulnerability — Microsoft Active Directory
Microsoft Active Directory Domain Services contains an unspecified vulnerability that allows for privilege escalation.
- Added to KEV
- 2022-04-11
- Remediation due
- 2022-05-02
- Ransomware use
- Known
- Required action
- Apply updates per vendor instructions.
- Notes
- https://nvd.nist.gov/vuln/detail/CVE-2021-42278
- Status
- Analyzed
- Published
- 2021-11-10
- Last modified
- 2026-08-19
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.5 MEDIUM — AV:N/AC:L/Au:S/C:P/I:P/A:P
Description
Active Directory Domain Services Elevation of Privilege Vulnerability
Affected configurations
• microsoft windows server 2004 (< 10.0.19041.1348)
• microsoft windows server 2008
• microsoft windows server 2008 r2
• microsoft windows server 2012
• microsoft windows server 2012 r2
• microsoft windows server 2016 (< 10.0.14393.4770)
• microsoft windows server 2019 (< 10.0.17763.2300)
• microsoft windows server 2022 (< 10.0.20348.350)
• microsoft windows server 20h2 (< 10.0.19042.1348)
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42278 Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42278 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42278 US Government Resource