CVE-2026-3987
Received
Received - Intake
Path Traversal in WatchGuard Fireware OS Enables Remote Code Execution
Publication date: 2026-04-01
Last updated on: 2026-04-01
Assigner: WatchGuard Technologies, Inc.
Description
Description
A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process.This issue affects Fireware OS 12.6.1 up to and including 12.11.8 and 2025.1 up to and including 2026.1.2.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| watchguard | fireware_os | to 12.11.8 (inc) |
| watchguard | fireware_os | to 2026.1.2 (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-22 | The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a path traversal issue in the Fireware OS Web UI on WatchGuard Firebox systems. It allows a privileged authenticated remote attacker to execute arbitrary code with elevated system process privileges.
The affected versions include Fireware OS 12.6.1 up to and including 12.11.8, and 2025.1 up to and including 2026.1.2.
How can this vulnerability impact me? :
An attacker who successfully exploits this vulnerability can execute arbitrary code with elevated system privileges on the affected WatchGuard Firebox system.
- This could lead to full system compromise.
- It may allow the attacker to bypass security controls.
- It could result in unauthorized access to sensitive data or disruption of network security functions.
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