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Vulnerability Intelligence Report
Win32k Elevation of Privilege Vulnerability

CVE-2020-1054

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.

CISA KEV SSVC: Active Exploitation
CVSS Base Score
7.8
HIGH
Exploitability:1.9
Impact Score:5.9
EPSS Probability:52.78%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—

Weaknesses (CWE)

CWE-787 ↗CWE-787 Out-of-bounds Write

Affected Products & Versions

Vendor Product Affected Versions
Microsoft Windows 10 Version 1507 10.0.10240.0 < publication (affected)
Microsoft Windows 10 Version 1607 10.0.14393.0 < publication (affected)
Microsoft Windows 10 Version 1709 10.0.0 < publication (affected)
Microsoft Windows 10 Version 1709 for 32-bit Systems 10.0.0 < publication (affected)
Microsoft Windows 10 Version 1803 10.0.0 < publication (affected)
Microsoft Windows 10 Version 1809 10.0.17763.0 < publication (affected)
Microsoft Windows 10 Version 1809 10.0.0 < publication (affected)
Microsoft Windows 10 Version 1903 for 32-bit Systems 10.0.0 < publication (affected)
Microsoft Windows 10 Version 1903 for ARM64-based Systems 10.0.0 < publication (affected)
Microsoft Windows 10 Version 1903 for x64-based Systems 10.0.0 < publication (affected)
Microsoft Windows 10 Version 1909 10.0.0 < publication (affected)
Microsoft Windows 7 6.1.0 < publication (affected)
Microsoft Windows 7 Service Pack 1 6.1.0 < publication (affected)
Microsoft Windows 8.1 6.3.0 < publication (affected)
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 < publication (affected)
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 < publication (affected)
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0 < publication (affected)
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 < publication (affected)
Microsoft Windows Server 2012 6.2.9200.0 < publication (affected)
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 < publication (affected)
Microsoft Windows Server 2012 R2 6.3.9600.0 < publication (affected)
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 < publication (affected)
Microsoft Windows Server 2016 10.0.14393.0 < publication (affected)
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 < publication (affected)
Microsoft Windows Server 2019 10.0.17763.0 < publication (affected)
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 < publication (affected)
Microsoft Windows Server, version 1803 (Server Core Installation) 10.0.0 < publication (affected)
Microsoft Windows Server, version 1903 (Server Core installation) 10.0.0 < publication (affected)
Microsoft Windows Server, version 1909 (Server Core installation) 10.0.0 < publication (affected)

References & Technical Advisories

No reference links found.

Threat Intelligence Signals

CISA KEV
ACTIVE IN CATALOG
EPSS Score
52.778%

Identity & Timeline

StatusPUBLISHED
Assigning AuthorityMicrosoft Corporation · Vendor · USA
Reserved2019-11-04T00:00:00
Published2020-05-21T22:52:50
Patch Date2020-05-12
Last Updated2026-08-19T16:33:26

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