Not yet, but it is on life support. As of late 2023/2024, many cloud-hosted FortiGates (FortiGate-VM on AWS/Azure) have forced upgrades past 6.4.6.
You are a managed user told explicitly to use it, or you are maintaining a legacy industrial control system (ICS). forticlient vpn 6.4.6 download
Disclaimer: Fortinet periodically sunsets older versions. By downloading 6.4.6, you accept the risks associated with running outdated encryption libraries. Always prioritize security patches over convenience. Have a legacy VPN horror story or a tip for making 6.4.6 work on Windows 11? Leave a comment below. Not yet, but it is on life support
You will not find older versions on the main Fortinet "Downloads" page unless you have a support contract. However, Fortinet maintains an archive. Fortinet maintains an archive.