Critical severity · published Sep 17, 2025
CVE-2025-9242
WatchGuard Firebox iked Out of Bounds Write Vulnerability
In wildKEV
9.8
CVSS
92.2%
EPSS
Yes
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)92.2% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 12, 2025
Federal remediation dueDec 3, 2025
Ransomware campaign useNot known
Affected products
Which versions
FO
Fireware OS · WatchGuard
11.0 through 11.12.4+541730; 12.0 before 12.11.4; 2025.0 before 2025.1.1; 12.0 before 12.3.1+722811; 12.0 before 12.5.13 · source: vendor
FI
Fireware · Watchguard
11.10.2 before 12.11.4; 11.10.2 before 12.5.13; 2025.1 · source: NVD
FI
Firebox · WatchGuard
All versions, or not specified · source: KEV
In the news
VulnerabilityCritical
[CISA KEV] CVE-2025-9242: WatchGuard Firebox - 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.
FIFireboxCVE-2025-9242
Nov 12, 2025·CISA KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9242
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9242
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
vendor-advisory
https://psirt.watchguard.com/CVE-2025-9242
vendor-advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015
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