WatchGuard Firebox Out of Bounds Write Vulnerability

Technical Severity

CVSS v3.1 Metrics

CRITICAL

9.8 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation Likelihood

EPSS Prediction

24.07 %

Predictive Probability

Percentile Rank

96.1 th

Documented as more likely to be exploited than 96.1% of known CVEs.

Detection Date

Dec 19, 2025

Remediation Due

Dec 26, 2025

CISA Catalog Active

Threat Analysis

WatchGuard Fireware OS iked process contains an out of bounds write vulnerability in the OS iked process. This vulnerability may allow a remote unauthenticated attacker to execute arbitrary code and affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer.

Remediation Directive

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

External Intelligence

Check for signs of potential compromise on all internet accessible instances after applying mitigations. For more information please see:

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00027

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2025-14733