Path Traversal in Watchguard Fireware OS

CVE-2026-93864

A link following vulnerability in WatchGuard Fireware OS’s firewall daemon allows a local attacker with code execution as a low-privileged system process to overwrite arbitrary files with root privileges, and to tamper with firewall IP set data, by planting a crafted file system object and triggering a list update. Written content is partially constrained.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-10-27.