PT-2026-55328 · Watchguard · Fireware Os

Cody Sixteen · Published 2026-07-02 · Updated 2026-07-03 · CVE-2026-13371

Mitre

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put data endpoint, which performs unsafe deserialization of the attacker-supplied input.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-13371

Affected Products

Fireware Os

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-13371 · Security Note
• https://watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014 · Vendor Advisory