# CVE-2025-9242: WatchGuard Firebox iked Out of Bounds Write Vulnerability

> CVE-2025-9242: WatchGuard Firebox iked Out of Bounds Write Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2025-9242
Last updated: 2026-08-10T19:59:12Z

- Published: 2025-09-17 07:29 UTC · Updated: 2026-08-10 19:59 UTC · Assigner: WatchGuard
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 91.8%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-11-12, federal due date 2025-12-03, ransomware use: Unknown
- CWE: CWE-787

## Description

An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked process may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer. If the Firebox was previously configured with the mobile user VPN with IKEv2 or a branch office VPN using IKEv2 to a dynamic gateway peer, and both of those configurations have since been deleted, that Firebox may still be vulnerable if a branch office VPN to a static gateway peer is still configured.

## CISA required action

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

## Affected vendors and products

- WatchGuard: Fireware OS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-9242)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-9242)
- [https://psirt.watchguard.com/CVE-2025-9242](https://psirt.watchguard.com/CVE-2025-9242)
- [https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015](https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-9242 · Markdown: https://rewindex.com/cve/CVE-2025-9242.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-9242 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:07.028Z