Microsoft Windows Kernel Privilege Escalation Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2021-11-03
• EPSS: 10% chance of exploitation in the next 30 days (higher than 96% of CVEs)

[ Description ]Official description

Windows Kernel Elevation of Privilege Vulnerability

CISA: Microsoft Windows kernel contains an unspecified vulnerability that allows for privilege escalation.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 17 Nov 2021): Apply updates per vendor instructions.

• Patch on msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on portal.msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2021-33771PatchVendor Advisory
• portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33771PatchVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource