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
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2019-11-04T00:00:00 |
| Published | 2020-05-21T22:52:50 |
| Patch Date | 2020-05-12 |
| Last Updated | 2026-08-19T16:33:26 |
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