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CVE-2025-14733: WatchGuard Firebox Out of Bounds Write Vulnerability

criticalknown exploitedpublic exploitCVE-2025-14733
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
WatchGuard Fireware OS iked process contains an out of bounds write vulnerability in the OS iked process. This vulnerability may allow a remote unauthenticated attacker to execute arbitrary code and affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer.

CSIRTS triage

vendor: WatchGuardproduct: Fireware OSRemote code execution
What
This vulnerability may allow a remote unauthenticated attacker to execute arbitrary code.
Who is affected
Deployments of WatchGuard Fireware OS using the iked process.
Urgency
Remediation is urgent due to the critical nature of the vulnerability and confirmed exploitation.
Action
Apply the latest patches provided by WatchGuard.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-12-19
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-14733

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-14733coverage & exploitation statusNVD · CVE.org

Recent advisories for WatchGuard Firebox Out

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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