CVE-2026-13371

EUVD-2026-41447
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.9 MEDIUM
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 28.12%
Affected Products (NVD)
VendorProductVersion
watchguardfireware
2025.1 ≤
𝑥
< 2026.2.1
watchguardfireware
12.5 ≤
𝑥
< 12.5.19
watchguardfireware
12.0 ≤
𝑥
< 12.12.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://psirt.watchguard.com/CVE-2026-13371
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014