CVE-2026-13371 json
WatchGuard Firebox Management Web UI Denial of Service via Unsafe Deserialization
published 2026-07-02 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-41447
- cvss
- 4.9
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- WatchGuard Fireware OS 12.5.19, 12.11.9, 12.12.1, 2026.2.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
Affected products
- WatchGuard Fireware OS
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
psirt.watchguard.com
/CVE-2026-13371
vendor-advisory, broken-link
-
watchguard.com
/wgrd-psirt/advisory/wgsa-2026-00014
vendor-advisory
Sources
- CVE List CVE-2026-13371
- NVD CVE-2026-13371
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