CVE-2021-40449
Microsoft Windows Win32k Privilege Escalation Vulnerability
CVSS
—
No CVSS
EPSS
74.1%
p99
KEV
YES
Nov 17, 2021
Exploit Today
80
0-100
Published: — · Last modified: —
74.1%EPSS · 30 days74.1%
2026-08-022026-08-31
Product
Microsoft / Windows
Vulnerability
Microsoft Windows Win32k Privilege Escalation Vulnerability
Added to KEV
Nov 17, 2021
Remediate by
Dec 1, 2021
Known ransomware use
Yes
Summary description
Unspecified vulnerability allows for an authenticated user to escalate privileges.
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-40449
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