CVE-2021-40450

HighCVSS 7.8/10Known exploited (CISA KEV)Last modified Jun 17, 2026

Description

Win32k Elevation of Privilege Vulnerability

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

VendorProductVersions
MicrosoftWindows 10 Version 1809>= 10.0.0, < 10.0.17763.2237
MicrosoftWindows Server 2019>= 10.0.0, < 10.0.17763.2237
MicrosoftWindows Server 2019 (Server Core installation)>= 10.0.0, < 10.0.17763.2237
MicrosoftWindows 10 Version 1909>= 10.0.0, < 10.0.18363.1854
MicrosoftWindows 10 Version 21H1>= 10.0.0, < 10.0.19043.1288
MicrosoftWindows Server 2022>= 10.0.0, < 10.0.20348.288
MicrosoftWindows 10 Version 2004>= 10.0.0, < 10.0.19041.1288
MicrosoftWindows Server version 2004>= 10.0.0, < 10.0.19041.1288
MicrosoftWindows 10 Version 20H2>= 10.0.0, < 10.0.19042.1288
MicrosoftWindows Server version 20H2>= 10.0.0, < 10.0.19042.1288
MicrosoftWindows 11 version 21H2>= 10.0.0, < 10.0.22000.258

References

Timeline

Published
Oct 13, 2021
Last modified
Jun 17, 2026
Added to CISA KEV
Apr 25, 2022
NVD status
Analyzed

Related CVEs from 2021

CVE-2021-40450: High severity, CVSS 7.8 | Vulnix