CVE-2016-7541: Fortinet FortiOS

Medium severity, CVSS 5.9. EPSS: 1% chance of exploitation in the next 30 days.

Long lived sessions in Fortinet FortiGate devices with FortiOS 5.x before 5.4.0 could violate a security policy during IPS signature updates when the FortiGate's IPSengine is configured in flow mode. All FortiGate versions with IPS configured in proxy mode (the default mode) are not affected.

Affected products

• Fortinet FortiOS: version 5.0.0 only; version 5.0.1 only; version 5.0.2 only; version 5.0.3 only; version 5.0.4 only; version 5.0.5 only; …

Published 2017-03-30. Last modified 2026-06-17.