CVE-2016-1909: Fortinet FortiOS

Critical severity, CVSS 9.8. EPSS: 71.3% chance of exploitation in the next 30 days.

Fortinet FortiAnalyzer before 5.0.12 and 5.2.x before 5.2.5; FortiSwitch 3.3.x before 3.3.3; FortiCache 3.0.x before 3.0.8; and FortiOS 4.1.x before 4.1.11, 4.2.x before 4.2.16, 4.3.x before 4.3.17 and 5.0.x before 5.0.8 have a hardcoded passphrase for the Fortimanager_Access account, which allows remote attackers to obtain administrative access via an SSH session.

Affected products

• Fortinet FortiOS: up to and including 4.3.16; version 5.0 only; version 5.0.0 only; version 5.0.1 only; version 5.0.2 only; version 5.0.3 only; …

Published 2016-01-15. Last modified 2026-06-17.