CVE-2021-42278

high Microsoft ⚠️ CISA KEV — Exploited in the Wild
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
EPSS Score
70.2%
Exploitation probability in 30 days
Top 1% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: November 10, 2021 (1763 days ago)
Last Modified: August 6, 2026
Vendor: Microsoft
Source: MITRE

⚠️ CISA Known Exploited Vulnerability

Added to KEV: 2022-04-11
Remediation Due: 2022-05-02 (⚠ 1590d overdue)
Ransomware Campaign: Known

Description

Active Directory Domain Services Elevation of Privilege Vulnerability

Affected Products

Microsoft Windows Server 2019Microsoft Windows Server 2019 (Server Core installation)Microsoft Windows Server 2022Microsoft Windows Server version 2004Microsoft Windows Server version 20H2Microsoft Windows Server 2016Microsoft Windows Server 2016 (Server Core installation)Microsoft Windows Server 2008 Service Pack 2Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)Microsoft Windows Server 2008 Service Pack 2

References

🔗 portal.msrc.microsoft.com