CVE-2005-1837: Fortinet Firewall

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

Fortinet firewall running FortiOS 2.x contains a hardcoded username with the password set to the serial number, which allows local users with console access to gain privileges.

Affected products

• Fortinet Fortinet Firewall: any version

Published 2005-06-01. Last modified 2026-06-16.