Fortigate Firmware Jun 2026

Fortinet continuously develops FortiOS to address emerging cyber threats. Firmware releases are broadly structured into major versions (e.g., FortiOS 7.x, 8.x) and split into two distinct release intents:

: Downgrading may cause loss of configuration elements that were introduced in the newer firmware version. New CLI syntax that does not exist in the previous version is discarded during the downgrade process and is not restored automatically. Always restore a configuration backup taken before the original upgrade after completing a downgrade. fortigate firmware