Buffer Overflow in WatchGuard Fireware OS Management Web UI

Executive Summary

This is a buffer overflow vulnerability in WatchGuard Fireware OS's Management Web UI, specifically in the wgagent component. An authenticated administrator with network access can exploit it by sending specially crafted network traffic to cause a denial of service (DoS) or potentially execute arbitrary code. The flaw could crash the wgagent process, disrupting authentication services and leading to remote code execution due to memory corruption.

Useful 0 Not Useful 0

Detection Guidance

Monitor for crashes in the wgagent process or authentication service disruptions. Check Fireware OS logs for unusual traffic patterns targeting the Management Web UI. WatchGuard Firebox appliances may show increased CPU or memory usage during exploitation attempts.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can allow an attacker to crash critical services, disrupt network operations, or execute malicious code on affected systems. For administrators, it may lead to loss of control over managed devices, unauthorized access, or system downtime. Organizations using vulnerable Fireware OS versions are at risk if management interfaces are exposed to untrusted networks.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could lead to unauthorized code execution or denial of service, potentially compromising data confidentiality and availability. For GDPR, this may result in unauthorized access to personal data, requiring breach notifications. For HIPAA, it could expose protected health information, violating security requirements.

Useful 0 Not Useful 0

Mitigation Strategies

Apply available patches for Fireware OS versions 2026.2.2, 12.12.2, or 12.5.20. Restrict network access to the Management Web UI by disabling remote management or using VPNs. Avoid exposing management interfaces to untrusted networks.

Useful 0 Not Useful 0