# CVE-2025-11838

## Summary

- **CVE ID:** CVE-2025-11838
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-763, CWE-763
- **Published:** Dec 4, 2025
- **Last Modified:** Aug 10, 2026

## Description

A memory corruption vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker to trigger a Denial of Service (DoS) condition in the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.

This vulnerability affects Fireware OS 12.6.1 up to and including 12.11.4 and 2025.1 up to and including 2025.1.2.

## Affected Products

- WatchGuard — Fireware OS (12.6.1)
- WatchGuard — Fireware OS (2025.1)

## References

- [CNA](https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00018)
- [CNA](https://psirt.watchguard.com/CVE-2025-11838)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.50%
- **EPSS Percentile:** 40.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._