# CVE-2026-19318

## Summary

- **CVE ID:** CVE-2026-19318
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-121, CWE-129, CWE-191
- **Published:** Aug 27, 2026
- **Last Modified:** Sep 3, 2026

## Description

A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to execute arbitrary code by sending specially crafted network traffic.

## Affected Products

- WatchGuard — Fireware OS (2025.0)
- WatchGuard — Fireware OS (12.0)
- WatchGuard — Fireware OS (2026.3)

## References

- [CNA](https://psirt.watchguard.com/CVE-2026-19318)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.47%
- **EPSS Percentile:** 39.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-09._