by Kastro
Paper/Archive/CVE-2025-9242

CVE-2025-9242

WatchGuard Fireware OS — WatchGuard Firebox iked Out of Bounds Write Vulnerability

KEV · due 3 DecEPSS 92%public exploitSSVC actCVSS 9.3
critical.is priorityof 100
98
CVSS 9.3 (CNA)9.3 / 10 × 3027.9In CISA KEV+3030.0EPSS percentile 99.8.998 × 2020.0Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Fireware OS11.0 – 11.12.4+541730–CNA
Fireware OS12.0 – < 12.11.412.11.4CNA
Fireware OS2025.0 – < 2025.1.12025.1.1CNA
Fireware OS12.0 – < 12.3.1+72281112.3.1+722811CNA
Fireware OS12.0 – < 12.5.1312.5.13CNA

Scores by source

WatchGuard (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

advisorypsirt.watchguard.com/CVE-2025-9242advisorywatchguard.com/wgrd-psirt/advisory/wgsa-2025-00015exploitgithub.com/watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-9242/blob/main/watchTowr-vs-WatchGuard-CVE-2025-9242.pyrefcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-9242kevcisa.gov/known-exploited-vulnerabilities-catalog