CVE-2026-20820
Medium
Elevated severity or exploit probability.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
2.6%
84.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-122
Published 2026-01-13 · modified 2026-07-30
Description
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.