CVE-2021-42278
Active Directory Domain Services Elevation of Privilege Vulnerability
KEV RANSOMWAREHIGH 7.5EPSS 73.3%
Active Directory Domain Services Elevation of Privilege Vulnerability
- Affected
- Microsoft · Windows Server 2008 R2 Service Pack 1 · Windows Server 2008 R2 Service Pack 1 (Server Core installation) · Windows Server 2008 Service Pack 2 · Windows Server 2008 Service Pack 2 (Server Core installation) · Windows Server 2012 · Windows Server 2012 (Server Core installation)
- CVSS v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 6.5 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P - EPSS
- 73.30% chance of exploitation in the next 30 days, 99th percentile
- CISA KEV
- added 2022-04-11, used in ransomware campaigns
- Published
- 2021-11-10
- Updated
- 2026-08-19
Proof-of-concept exploits (8)
- 0x5900FX/Tools-Script0★ · 2025-07-14
- WazeHell/sam-the-admin1069★ · 2022-07-10
- XiaoliChan/Invoke-sAMSpoofing39★ · 2022-04-04
- ly4k/Pachine278★ · 2022-01-13
- puckiestyle/sam-the-admin0★ · 2021-12-24
- safebuffer/sam-the-admin1070★ · 2022-07-10
- tufanturhan/sam-the-admin0★ · 2022-04-15
- xLTJ/noPac0★ · 2026-07-07
Exploit collections (1)
- CVE-2021-42278helloexp/0day
Security advisories
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42278
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42278