SB20260114101 - Path traversal in Microsoft Windows
Published: January 14, 2026
Security Bulletin ID
SB20260114101
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Path traversal (CVE-ID: CVE-2026-20834)
CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSSv4: 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
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 update from vendor's website.