#VU121451 Path traversal in Windows and Windows Server - CVE-2026-20834

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU121451

#VU121451 Path traversal in Windows and Windows Server - CVE-2026-20834

Published: January 14, 2026


Vulnerability identifier: #VU121451
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-20834
CWE-ID: CWE-22
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Windows
Windows Server
Software vendor:
Microsoft

Description

The vulnerability allows a local attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in Windows. An attacker with physical access can send a specially crafted HTTP request and read arbitrary files on the system.


Remediation

Install updates from vendor's website.

External links