CVE-2025-9242WatchGuard Firebox iked Out of Bounds Write Vulnerability
Known exploited — WatchGuard Firebox Out-of-Bounds Write Vulnerability
CISA confirmed this vulnerability is used in real attacks on 12.11.2025. Remediation deadline for US federal agencies: 03.12.2025.
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. https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015 ; https://nvd.nist.gov/vuln/detail/CVE-2025-9242
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| watchguard | fireware | 11.10.2 – < 12.11.4 | |
| WatchGuard | Fireware OS | 11.0 – ≤ 11.12.4+541730, 12.0 – < 12.11.4, 2025.0 – < 2025.1.1 |
References and patches
- https://psirt.watchguard.com/CVE-2025-9242 vendor-advisoryBroken Link
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015 vendor-advisoryVendor Advisory
- https://github.com/watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-9242/blob/main/watchTowr-vs-WatchGuard-CVE-… Exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-9242 US Government Resource
CPE matches (NVD) (3)
cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*≥ 11.10.2 < 12.11.4cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*≥ 11.10.2 < 12.5.13cpe:2.3:o:watchguard:fireware:2025.1:*:*:*:*:*:*:*