WatchGuard Firebox remote code execution flaw actively exploited
WatchGuard Firebox appliances contain an actively exploited out-of-bounds write vulnerability (CVE-2025-14733) allowing unauthenticated remote code execution.
Sourceipa.go.jp — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- CISA lists CVE-2025-14733 as exploited in the wild.
Japan's IPA has issued a security alert regarding a critical vulnerability in WatchGuard Firebox security appliances. The vulnerability, tracked as CVE-2025-14733, is an out-of-bounds write flaw that can be exploited by unauthenticated remote attackers to achieve arbitrary code execution on affected devices.
WatchGuard Technologies has confirmed that this vulnerability is being actively exploited in the wild. The vendor has released patches for Fireware OS versions 12.10.5, 12.11.5, and 12.12.1. However, Fireware OS 11.x has reached end-of-life and will not receive security updates, requiring affected organizations to upgrade to a supported version.
Given the active exploitation and the critical nature of firewall appliances in network security architecture, organizations using WatchGuard Firebox products should prioritize patching immediately. The IPA warns that damage may expand and strongly recommends following the vendor's update procedures without delay.
Mentioned in this report
Source reporting: https://www.ipa.go.jp/security/security-alert/2025/alert20251223.html
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