CVE-2026-3987: CWE-22 in WatchGuard Fireware OS
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.
AI Analysis
Technical Summary
This vulnerability (CWE-22) involves improper sanitization of file paths in the Fireware OS Web UI, enabling a privileged authenticated remote attacker to perform path traversal. This can lead to arbitrary code execution within the context of an elevated system process on WatchGuard Firebox systems running affected versions. The CVSS 4.0 base score is 8.6, indicating high severity with network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows a privileged authenticated remote attacker to execute arbitrary code with elevated system privileges, potentially compromising the affected Firebox system's confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, restrict access to the Fireware OS Web UI to trusted administrators and monitor for unusual activity.
CVE-2026-3987: CWE-22 in WatchGuard Fireware OS
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.
CVSS v4.0
Score 8.6high
Affected software
WatchGuard
Fireware OS
pkg:github/watchguard/fireware-osRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-22) involves improper sanitization of file paths in the Fireware OS Web UI, enabling a privileged authenticated remote attacker to perform path traversal. This can lead to arbitrary code execution within the context of an elevated system process on WatchGuard Firebox systems running affected versions. The CVSS 4.0 base score is 8.6, indicating high severity with network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows a privileged authenticated remote attacker to execute arbitrary code with elevated system privileges, potentially compromising the affected Firebox system's confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, restrict access to the Fireware OS Web UI to trusted administrators and monitor for unusual activity.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2026-03-11T15:01:46.222Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69cd93efe6bfc5ba1d0036f2
Added to database: 04/01/2026, 21:53:51 UTC
Last enriched: 08/11/2026, 15:15:52 UTC
Last updated: 09/11/2026, 22:06:33 UTC
Views: 178
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