High7.0Microsoft Server Exploited CISA KEV

High [CVE-2020-1054] Win32k Elevation of Privilege Vulnerability

This high-severity Microsoft Server advisory covers CVE-2020-1054 affecting Windows Server 2008 R2 Service Pack 1 (Server Core installation), Windows Server 2008 Service Pack 2 (Server Core installation), Windows Server 2012 (Server Core installation).

CVE-2020-1054 Published May 21, 2020Updated by vendor Aug 19, 2026

CVE-2020-1054

Affected products & platforms

Microsoft ServerWindows Server

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Summary

An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode.

An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system.

An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The update addresses this vulnerability by correcting how the Windows kernel-mode driver handles objects in memory.

Affected products named by the advisory: 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); and 11 more.

Affected products named by the advisory: Windows Server 2012 (Server Core installation); Windows Server 2012 R2 (Server Core installation); Windows Server 2016 (Server Core installation); Windows Server 2019 (Server Core installation); and 3 more.

CISA Known Exploited Vulnerability

Listed:: Nov 3, 2021 · federal remediation due May 3, 2022
Required action:: Apply updates per vendor instructions.
Ransomware use:: Unknown

KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.

Affected versions

Windows 10 Version 1507 10.0.10240.0 before publication
Windows 10 Version 1607 10.0.14393.0 before publication
Windows 10 Version 1709 10.0.0 before publication
Windows 10 Version 1709 for 32-bit Systems 10.0.0 before publication
Windows 10 Version 1803 10.0.0 before publication
Windows 10 Version 1809 10.0.17763.0 before publication
Windows 10 Version 1809 10.0.0 before publication
Windows 10 Version 1903 for 32-bit Systems 10.0.0 before publication
Windows 10 Version 1903 for ARM64-based Systems 10.0.0 before publication
Windows 10 Version 1903 for x64-based Systems 10.0.0 before publication
Windows 10 Version 1909 10.0.0 before publication
Windows 7 6.1.0 before publication

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

Fixed versions

publication

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

Mitigation checklist

Recommended fix / mitigation

An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
The update addresses this vulnerability by correcting how the Windows kernel-mode driver handles objects in memory.

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

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