CVE-2021-42278
HighPublished
Active Directory Domain Services Elevation of Privilege Vulnerability
- Published
- Nov 10, 2021
- Updated
- Aug 6, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Apr 11, 2022
Primary CVSS
7.5/ 10High
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H73.3%
High · next 30 days
- Percentile
- 99.5%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
Active Directory Domain Services Elevation of Privilege Vulnerability
Sources
13- noPacExploit
CVE-2021-42287/CVE-2021-42278 Scanner & Exploiter.
- noPac-detectionDetection
Detection script for CVE-2021-42278 and CVE-2021-42287
- PachineExploit
Python implementation for CVE-2021-42278 (Active Directory Privilege Escalation)
- noPacExploit
Responsible use
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