SB2026040226 - Path traversal in WatchGuard Fireware OS
Published: April 2, 2026
Security Bulletin ID
SB2026040226
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Path traversal (CVE-ID: CVE-2026-3987)
The vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in Fireware Web UI. A remote administrator can send a specially crafted HTTP request and upload arbitrary files on the system, leading to arbitrary code execution.
Remediation
Install update from vendor's website.