# CVE-2020-1054: Win32k Elevation of Privilege Vulnerability

> CVE-2020-1054: Win32k Elevation of Privilege Vulnerability. CVSS 7.0 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-1054
Last updated: 2026-10-07T17:30:41Z

- Published: 2020-05-21 22:52 UTC · Updated: 2026-10-07 17:30 UTC · Assigner: microsoft
- CVSS: 7.0 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
- EPSS: 53.9%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2021-11-03, federal due date 2022-05-03, ransomware use: Unknown

## Description

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 required action

Apply updates per vendor instructions.

## Affected vendors and products

- Microsoft: Windows 10 Version 1507
- Microsoft: Windows 10 Version 1607
- Microsoft: Windows 10 Version 1709
- Microsoft: Windows 10 Version 1709 for 32-bit Systems
- Microsoft: Windows 10 Version 1803
- Microsoft: Windows 10 Version 1809
- Microsoft: Windows 10 Version 1903 for 32-bit Systems
- Microsoft: Windows 10 Version 1903 for ARM64-based Systems
- Microsoft: Windows 10 Version 1903 for x64-based Systems
- Microsoft: Windows 10 Version 1909
- Microsoft: Windows 7
- Microsoft: Windows 7 Service Pack 1
- Microsoft: Windows 8.1
- Microsoft: Windows Server 2008 R2 Service Pack 1
- Microsoft: Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- Microsoft: Windows Server 2008 Service Pack 2
- Microsoft: Windows Server 2008 Service Pack 2 (Server Core installation)
- Microsoft: Windows Server 2012
- Microsoft: Windows Server 2012 R2
- Microsoft: Windows Server 2012 R2 (Server Core installation)
- Microsoft: Windows Server 2012 (Server Core installation)
- Microsoft: Windows Server 2016
- Microsoft: Windows Server 2016 (Server Core installation)
- Microsoft: Windows Server 2019
- Microsoft: Windows Server 2019 (Server Core installation)
- Microsoft: Windows Server, version 1803  (Server Core Installation)
- Microsoft: Windows Server, version 1903 (Server Core installation)
- Microsoft: Windows Server, version 1909 (Server Core installation)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-1054)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-1054)
- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1054](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1054)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-1054 · Markdown: https://rewindex.com/cve/CVE-2020-1054.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-1054 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:09.212Z