CVE-2026-20820
HighCVSS 7.8Exploitation Probability (EPSS)
High risk83th percentile - higher than 83% of all known CVEs
Summary
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Risk Assessment
An attacker with limited access can gain full administrative privileges, leading to complete system compromise.
Recommendation
Install the latest Windows security updates from Microsoft.
Other vulnerabilities in Windows Common Log File System Driver
See all- CVE-2026-85870High
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
- CVE-2026-85868High
Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
- CVE-2026-85355High
Inclusion of functionality from untrusted control sphere in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
- CVE-2026-70233High
Heap-based buffer overflow in the Windows Common Log File System Driver. An authorized attacker can elevate privileges locally.
- CVE-2026-40407High
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
- CVE-2025-32706HighActively exploited
Improper input validation in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
- CVE-2025-32701HighActively exploited
Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
- CVE-2025-29824HighActively exploited
Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
- CVE-2024-49138HighActively exploited
Windows Common Log File System Driver Elevation of Privilege Vulnerability. Technical details were not provided in the description.
- CVE-2023-36900High
A vulnerability in the Windows Common Log File System Driver allows for elevation of privilege. An attacker can exploit this flaw to gain higher privileges in the system.
Original NVD description (English source)
Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS