CVE-2021-42278

HighCVSS 7.5/10Known exploited (CISA KEV)Last modified Aug 19, 2026

Description

Active Directory Domain Services Elevation of Privilege Vulnerability

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

VendorProductVersions
MicrosoftWindows Server 2008 R2 Service Pack 1>= 6.1.7601.0, < 6.1.7601.25769
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)>= 6.1.7601.0, < 6.1.7601.25769
MicrosoftWindows Server 2008 Service Pack 2>= 6.0.6003.0, < 6.0.6003.21282
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)>= 6.0.6003.0, < 6.0.6003.21282
MicrosoftWindows Server 2012>= 6.2.9200.0, < 6.2.9200.23517
MicrosoftWindows Server 2012 (Server Core installation)>= 6.2.9200.0, < 6.2.9200.23517
MicrosoftWindows Server 2012 R2>= 6.3.9600.0, < 6.3.9600.20174
MicrosoftWindows Server 2012 R2 (Server Core installation)>= 6.3.9600.0, < 6.3.9600.20174
MicrosoftWindows Server 2016>= 10.0.14393.0, < 10.0.14393.4770
MicrosoftWindows Server 2016 (Server Core installation)>= 10.0.14393.0, < 10.0.14393.4770
MicrosoftWindows Server 2019>= 10.0.17763.0, < 10.0.17763.2300
MicrosoftWindows Server 2019 (Server Core installation)>= 10.0.17763.0, < 10.0.17763.2300
MicrosoftWindows Server 2022>= 10.0.20348.0, < 10.0.20348.350
MicrosoftWindows Server version 2004>= 10.0.0, < 10.0.19041.1348
MicrosoftWindows Server version 20H2>= 10.0.0, < 10.0.19042.1348

References

Timeline

Published
Nov 10, 2021
Last modified
Aug 19, 2026
Added to CISA KEV
Apr 11, 2022
NVD status
Analyzed

Related CVEs from 2021

CVE-2021-422794.2Chakra Scripting Engine Memory Corruption VulnerabilityCVE-2021-42287.4Use of hard-coded TLS certificate by default allows an attacker to perform Man-in-the-Middle (MitM) attacks even in the presence of the HTTPCVE-2021-422805.5Windows Feedback Hub Elevation of Privilege VulnerabilityCVE-2021-422827.5Active Directory Domain Services Elevation of Privilege VulnerabilityCVE-2021-422838.8NTFS Elevation of Privilege VulnerabilityCVE-2021-422846.8Windows Hyper-V Denial of Service VulnerabilityCVE-2021-422857.8Windows Kernel Elevation of Privilege VulnerabilityCVE-2021-422867.8Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege VulnerabilityCVE-2021-422877.5Active Directory Domain Services Elevation of Privilege VulnerabilityCVE-2021-422885.7Windows Hello Security Feature Bypass VulnerabilityCVE-2021-42298.8A vulnerability was found in ua-parser-js 0.7.29/0.8.0/1.0.0. It has been rated as critical. This issue affects the crypto mining component CVE-2021-422917.5Active Directory Domain Services Elevation of Privilege Vulnerability