CVE-2026-78008#
Fireware OS Authenticated Buffer Overflow in wgagent
Summary #
A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.
Impact: An authenticated attacker can crash the wgagent process, causing a denial-of-service condition for authentication services, with the potential for remote code execution due to memory corruption.
Product status #
| Product | Affected | Not affected |
|---|---|---|
| Fireware OS | ||
| Default | >= 2025.0, < 2026.2.2, >= 12.0, < 12.12.2 | >= 2026.2.2, >= 12.12.2 |
| T15/T35 | >= 12.0, < 12.5.20 | >= 12.5.20 |
Weakness Type and Impact #
Exploitation Status #
WatchGuard is not aware of any exploitation of this vulnerability in the wild.
Solution #
Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20
Workaround #
Administrators should not expose the Firebox's management interfaces to untrusted network locations. See our Firebox Remote Management Best Practices KB article for guidance on how to secure remote management to a Firebox.
References #
Credits #
- Cody Sixteen finder