CVE Catalog
CVE-2026-66799
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk0.27%
19th percentile - higher than 19% of all known CVEs
Summary
Heap-based buffer overflow in Windows Key Guard allows an authorized attacker to elevate privileges locally.
Risk Assessment
An authorized user could gain elevated privileges, potentially leading to full system compromise.
Recommendation
Install the latest Windows security updates.
Original NVD description (English source)
Heap-based buffer overflow in Windows Key Guard allows an authorized attacker to elevate privileges locally.