Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Watchguard | Fireware | >= 2025.1, < 2026.2.1 |
| Watchguard | Firebox M295 | - |
| Watchguard | Firebox M395 | - |
| Watchguard | Firebox M495 | - |
| Watchguard | Firebox M595 | - |
| Watchguard | Firebox M695 | - |
| Watchguard | Firebox T115-W | - |
| Watchguard | Firebox T125 | - |
| Watchguard | Firebox T125-W | - |
| Watchguard | Firebox T145 | - |
| Watchguard | Firebox T145-W | - |
| Watchguard | Firebox T185 | - |
| Watchguard | Firebox T15 | - |
| Watchguard | Firebox T35 | - |
| Watchguard | Firebox Cloud | - |
| Watchguard | Firebox M270 | - |
| Watchguard | Firebox M290 | - |
| Watchguard | Firebox M370 | - |
| Watchguard | Firebox M390 | - |
| Watchguard | Firebox M440 | - |
Related Weaknesses (CWE)
References
- https://psirt.watchguard.com/CVE-2026-13371Broken Link
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014Vendor Advisory
FAQ
What is CVE-2026-13371?
CVE-2026-13371 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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 deserial...
How severe is CVE-2026-13371?
CVE-2026-13371 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-13371?
Check the references section above for vendor advisories and patch information. Affected products include: Watchguard Fireware, Watchguard Firebox M295, Watchguard Firebox M395, Watchguard Firebox M495, Watchguard Firebox M595.