CVE-2021-42287

Active Directory Domain Services Elevation of Privilege Vulnerability

CVE-2021-42287 is fixed in 18 products on 1 platform, first by KB5007192, released November 9, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on April 11, 2022, with known ransomware use. Patch Radar priority: Patch now.

Patch nowCISA KEVKnown ransomware use

CVSS

7.5

Important

Exploitation

Exploited

Listed by CISA

CISA KEV

Apr 11, 2022

Federal due date May 2, 2022. Known ransomware use

EPSS

0.7717

99th percentile

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows Server 2008 R2 for x64-based Systems Service Pack 1		KB5007236	Nov 9, 2021
Windows Server 2008 R2 for x64-based Systems Service Pack 1		KB5007233	Nov 9, 2021
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)		KB5007236	Nov 9, 2021
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)		KB5007233	Nov 9, 2021
Windows Server 2008 for 32-bit Systems Service Pack 2		KB5007246	Nov 9, 2021
Windows Server 2008 for 32-bit Systems Service Pack 2		KB5007263	Nov 9, 2021
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)		KB5007246	Nov 9, 2021
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)		KB5007263	Nov 9, 2021
Windows Server 2008 for x64-based Systems Service Pack 2		KB5007246	Nov 9, 2021
Windows Server 2008 for x64-based Systems Service Pack 2		KB5007263	Nov 9, 2021
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)		KB5007246	Nov 9, 2021
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)		KB5007263	Nov 9, 2021
Windows Server 2012		KB5007260	Nov 9, 2021
Windows Server 2012		KB5007245	Nov 9, 2021
Windows Server 2012 (Server Core installation)		KB5007260	Nov 9, 2021
Windows Server 2012 (Server Core installation)		KB5007245	Nov 9, 2021
Windows Server 2012 R2		KB5007255	Nov 9, 2021
Windows Server 2012 R2		KB5007247	Nov 9, 2021
Windows Server 2012 R2 (Server Core installation)		KB5007255	Nov 9, 2021
Windows Server 2012 R2 (Server Core installation)		KB5007247	Nov 9, 2021
Windows Server 2016	14393.4770	KB5007192	Nov 9, 2021
Windows Server 2016 (Server Core installation)	14393.4770	KB5007192	Nov 9, 2021
Windows Server 2019	17763.2300	KB5007206	Nov 9, 2021
Windows Server 2019 (Server Core installation)	17763.2300	KB5007206	Nov 9, 2021
Windows Server 2022	20348.350	KB5007205	Nov 9, 2021
Windows Server 2022 (Server Core installation)	20348.350	KB5007205	Nov 9, 2021
Windows Server, version 2004 (Server Core installation)		KB5007186	Nov 9, 2021
Windows Server, version 20H2 (Server Core Installation)		KB5007186	Nov 9, 2021

Details

Published
November 9, 2021
CISA required action
Apply updates per vendor instructions.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42287

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