Due to the age of the "D" series hardware, it does not support more modern branches like FortiOS 6.2, 6.4, 7.0, or 7.2 [15, 21]. If you are looking for newer features or continued engineering support, Fortinet recommends upgrading to a newer series like the Latest Firmware Details (as of April 2026) Latest Version FortiOS 6.0.17 (Build 0528) [30]. Support Status
FortiGate 200D has reached its end-of-life (EOL) status, meaning it no longer receives major OS updates or official hardware support from Fortinet Router-Switch.com Latest Firmware Version The absolute final firmware version for the FortiGate 200D FortiOS 6.0.18 fortigate 200d latest firmware updated
typically caps out at (specifically, 6.0.17 or similar). Final Version: FortiOS 6.0.17 (build 0528 or higher). Due to the age of the "D" series
Once a device reaches End of Support, Fortinet no longer releases security patches for newly discovered vulnerabilities. Outdated devices will not receive updates, leaving your network exposed to new and emerging threats. Final Version: FortiOS 6