CVE-2021-42287

Known Exploited

Active Directory Domain Services Elevation of Privilege Vulnerability

Description

Active Directory Domain Services Elevation of Privilege Vulnerability

7.5

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 93.95% Top 5%

KEV Since

Vendor Advisory microsoft.com

Affected: Microsoft Windows Server 2019

Affected: Microsoft Windows Server 2019 (Server Core installation)

Affected: Microsoft Windows Server 2022

Affected: Microsoft Windows Server version 2004

Affected: Microsoft Windows Server version 20H2

Affected: Microsoft Windows Server 2016

Affected: Microsoft Windows Server 2016 (Server Core installation)

Affected: Microsoft Windows Server 2008 Service Pack 2

Affected: Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)

Affected: Microsoft Windows Server 2008 Service Pack 2

Affected: Microsoft Windows Server 2008 R2 Service Pack 1

Affected: Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)

Affected: Microsoft Windows Server 2012

Affected: Microsoft Windows Server 2012 (Server Core installation)

Affected: Microsoft Windows Server 2012 R2

Affected: Microsoft Windows Server 2012 R2 (Server Core installation)

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42287	patch vendor advisory

What is the severity of CVE-2021-42287?: CVE-2021-42287 has been scored as a high severity vulnerability.
How to fix CVE-2021-42287?: To fix CVE-2021-42287, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-42287 being actively exploited in the wild?: It is confirmed that CVE-2021-42287 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-42287?: CVE-2021-42287 affects Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows Server 2022, Microsoft Windows Server version 2004, Microsoft Windows Server version 20H2, Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation), Microsoft Windows Server 2008 Service Pack 2, Microsoft Windows Server 2008 Service Pack 2 (Server Core installation), Microsoft Windows Server 2008 Service Pack 2, Microsoft Windows Server 2008 R2 Service Pack 1, Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation), Microsoft Windows Server 2012, Microsoft Windows Server 2012 (Server Core installation), Microsoft Windows Server 2012 R2, Microsoft Windows Server 2012 R2 (Server Core installation).