[ CVE-2021-40449 · Published 13 Oct 2021 ]
Microsoft Windows Win32k Privilege Escalation Vulnerability
Exploited · CISA KEV CVSS 7.8
EPSS 82%Fix available
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2021-11-17
- Known to be used in ransomware campaigns
- EPSS: 82% chance of exploitation in the next 30 days (higher than 100% of CVEs)
[ Description ]Official description
Win32k Elevation of Privilege Vulnerability
CISA: Unspecified vulnerability allows for an authenticated user to escalate privileges.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 1 Dec 2021): Apply updates per vendor instructions.
- Patch on portal.msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
[ References ]References
- packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege…ExploitThird Party AdvisoryVDB Entry
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449PatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource