CVE-2021-40450
Microsoft Win32k Privilege Escalation Vulnerability
Published Oct 12, 2021 · updated Jun 16, 2026 · microsoft windows 10 1809
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
Timeline
Detection, updates, and resolution for this record.
Oct 12, 2021 · Catalog
Detected
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
Apr 25, 2022 · CISA KEV
Known exploited
Apply updates per vendor instructions.
May 16, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
Required action
Apply updates per vendor instructions.
CISA due date May 16, 2022
Affected
- cpe microsoft/windows 10 1809version unspecified
- cpe microsoft/windows 10 1909version unspecified
- cpe microsoft/windows 10 2004version unspecified
- cpe microsoft/windows 10 20h2version unspecified
- cpe microsoft/windows 10 21h1version unspecified
- cpe microsoft/windows 11 21h2version unspecified
- cpe microsoft/windows server 2004version unspecified
- cpe microsoft/windows server 2019version unspecified
- vendor Microsoft Win32kversion unspecified
Sources
- CISA KEVCVE-2021-40450
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
cisa.gov - CVE.orgCVE-2021-40450
Official CVE identifier
cve.org - FIRST EPSSCVE-2021-40450
30-day exploitation probability 1.6%
first.org - NIST NVDCVE-2021-40450
Win32k Elevation of Privilege Vulnerability
nvd.nist.gov