CVE-2021-40449

HIGHCISA KEV

7.8

Description

Win32k Elevation of Privilege Vulnerability

CVE Details

CVSS v3.1 Score7.8

SeverityHIGH

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

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published10/13/2021

Last Modified10/30/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorMicrosoft

ProductWindows

Vulnerability NameMicrosoft Windows Win32k Privilege Escalation Vulnerability

KEV Date Added2021-11-17

Remediation Due Date2021-12-01

Ransomware UseKnown

Affected Products

microsoft:windows_10_1507microsoft:windows_10_1607microsoft:windows_10_1809microsoft:windows_10_1909microsoft:windows_10_2004microsoft:windows_10_20h2microsoft:windows_10_21h1microsoft:windows_11microsoft:windows_11_21h2microsoft:windows_7microsoft:windows_8.1microsoft:windows_rt_8.1microsoft:windows_server_2004microsoft:windows_server_2008microsoft:windows_server_2012microsoft:windows_server_2016microsoft:windows_server_2019microsoft:windows_server_2022microsoft:windows_server_20h2

Weaknesses (CWE)

CWE-416CWE-416

References

http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html(secure@microsoft.com)

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449(secure@microsoft.com)

http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html(af854a3a-2127-422b-91ae-364da2661108)

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40449(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.