Critical [CVE-2025-9242] WatchGuard Firebox iked Out of Bounds Write Vulnerability
This critical-severity WatchGuard advisory covers CVE-2025-9242 affecting Fireware OS.
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Summary
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.
CISA Known Exploited Vulnerability
- Listed:
- Nov 12, 2025 · federal remediation due Dec 3, 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.
- Ransomware use:
- Unknown
KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.
- Fireware OS 11.0 through 11.12.4+541730
- Fireware OS 12.0 before 12.11.4
- Fireware OS 2025.0 before 2025.1.1
- Fireware OS 12.0 before 12.3.1+722811
- Fireware OS 12.0 before 12.5.13
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 12.11.4
- 2025.1.1
- 12.3.1+722811
- 12.5.13
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 12.11.4, 2025.1.1, 12.3.1+722811, 12.5.13. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Discussion(0)
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