High severity · published Oct 24, 2025
CVE-2025-4106
WatchGuard Firebox leftover debug code vulnerability
8.9
CVSS
0.3%
EPSS
No
On KEV
Description
An authenticated admin user with access to both the management WebUI and command line interface on a Firebox can enable a diagnostic debug shell by uploading a platform and version-specific diagnostic package and executing a leftover diagnostic command.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fireware OS · WatchGuard
12.0 before 12.11.3; 12.0 before 12.5.13 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-4106
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-4106
psirt.watchguard.com
https://psirt.watchguard.com/CVE-2025-4106
www.watchguard.com
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00010
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