CVE-2021-40450

HIGH KEV

Win32k - Privilege Escalation

Title source: llm

Description

Win32k Elevation of Privilege Vulnerability

References (2)

[Patch, Vendor Advisory] https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40450

[US Government Resource] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40450

Scores

CVSS v3 7.8

EPSS 0.0559

EPSS Percentile 90.3%

Attack Vector LOCAL

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

Details

CISA KEV 2022-04-25

VulnCheck KEV 2022-04-25

InTheWild.io 2021-10-12

ENISA EUVD EUVD-2021-27627

Status published

Products (10)

microsoft/windows_10_1809 < 10.0.17763.2237

microsoft/windows_10_1909 < 10.0.18363.1854

microsoft/windows_10_2004 < 10.0.19041.1288

microsoft/windows_10_20h2 < 10.0.19042.1288

microsoft/windows_10_21h1 < 10.0.19043.1288

microsoft/windows_11_21h2 < 10.0.22000.258

microsoft/windows_server_2004 < 10.0.19041.1288

microsoft/windows_server_2019 < 10.0.17763.2237

microsoft/windows_server_2022 < 10.0.20348.288

microsoft/windows_server_20h2 < 10.0.19042.1288

Published Oct 13, 2021

KEV Added Apr 25, 2022

Tracked Since Feb 18, 2026