CVE-2026-20820

HIGH
2026-01-13 [email protected]
7.8
CVSS 3.1
Share

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 13, 2026 - 18:16 nvd
HIGH 7.8

Tags

Windows Buffer Overflow Heap Overflow Windows Server 2016 Windows Server 2022 23h2 Windows 10 1607 Windows 10 22h2 Windows Server 2019 Windows 11 23h2 Windows Server 2025 Windows Server 2008 Windows 11 24h2 Windows 10 21h2 Windows Server 2022 Windows Server 2012 Windows 11 25h2 Windows 10 1809 Microsoft

Description

Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Analysis

Heap buffer overflow in Windows Common Log File System Driver (affecting Windows 10 1607, Server 2016, and Server 2022 23h2) enables authenticated local users to achieve complete system compromise through privilege escalation. The vulnerability requires valid credentials but no user interaction, making it a direct path to administrative control for insiders or attackers with initial access. …

Sign in for full analysis, threat intelligence, and remediation guidance.

Remediation

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

Sign in for detailed remediation steps.

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Sign in - Free

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +39
POC: 0

Share

CVE-2026-20820 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy