CVE entry · CVE-2025-9242
CVE-2025-9242: WatchGuard Firebox Out-of-Bounds Write Vulnerability
WatchGuard Firebox contains an out-of-bounds write vulnerability in the OS iked process that may allow a remote unauthenticated attacker to execute arbitrary code.
- Actively exploited: added to CISA’s KEV catalog on November 12, 2025.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: December 3, 2025.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes WatchGuard Firebox, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (www.watchguard.com)
- NVD entry (NIST)
- CISA KEV catalog
Other WatchGuard vulnerabilities
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CVE-2025-14733Used by ransomwareWatchGuard Firebox Out of Bounds Write Vulnerability