High severity · published Dec 4, 2025
CVE-2025-11838
WatchGuard Firebox iked Memory Corruption Vulnerability
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
A memory corruption vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker to trigger a Denial of Service (DoS) condition in the Mobile User VPN with IKEv2 and the Branch Office VPN using IKEv2 when configured with a dynamic gateway peer.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fireware OS · WatchGuard
2025.1 through 2025.1.3; 12.6.1 through 12.11.5 · source: vendor
FI
Fireware · Watchguard
2025.1 before 2025.1.3; 12.0.0 before 12.11.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11838
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11838
psirt.watchguard.com
https://psirt.watchguard.com/CVE-2025-11838
Vendor Advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00018
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