Fortigate Firmware

In an Active-Passive HA pair, upgrades can be done with minimal downtime. The passive unit upgrades first, then fails over, then the new passive upgrades. However, session failover may not be 100% seamless. Schedule a maintenance window and inform users.

Best for standalone units in a lab or branch office. fortigate firmware

If an upgrade introduces a critical issue, you can downgrade. However: In an Active-Passive HA pair, upgrades can be

Always keep a pre-upgrade configuration backup. If you need to downgrade, restore that backup after the firmware rollback. Always keep a pre-upgrade configuration backup

get system status

execute restore image <image_name>

execute reboot

Security is a race. Threat actors reverse-engineer patches to find vulnerabilities. Fortinet issues PSIRTs (FortiGuard Labs Security Advisories) regularly. For example, critical vulnerabilities like CVE-2022-40684 (Authentication bypass) impacted specific FortiOS versions. If you were running a vulnerable version, your management interface was essentially public property.

Three pillars of firmware updates: