CVE-2026-93864

Fireware OS Link Following in firewalld Allows Local Arbitrary File Overwrite as Root

State: Published
Severity: 7.1 High
Published: Oct 27, 2026
Updated: Oct 29, 2026
Reserved: Sep 18, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H	WatchGuard

Weaknesses

Affected Products

Product	Versions
Fireware OSWatchGuard	2025.1 to before 2026.4Affected 12.0 to before 12.12.4Affected
Fireware OSWatchGuard	12.0 to before 12.5.22Affected

References

https://psirt.watchguard.com/CVE-2026-93864vendor-advisory

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