#VU124818 Path traversal in Fireware OS - CVE-2026-3987

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Main Vulnerability Database Vulnerabilities #VU124818

#VU124818 Path traversal in Fireware OS - CVE-2026-3987

Published: April 2, 2026


Vulnerability identifier: #VU124818
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-3987
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Fireware OS
Software vendor:
WatchGuard

Description

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 updates from vendor's website.

External links