Always prioritize security over convenience. Download only from Fortinet’s official channels, verify the installer’s integrity, and work with your IT team to plan a long-term upgrade path. By following this guide, you can restore your VPN connectivity without compromising your network’s safety.

: If you are using the VPN for work, your IT administrator can download specific versions from their portal and provide the installer to you.

Downloading older versions of FortiClient VPN is a common requirement for maintaining compatibility with legacy gateways or specific operating systems. While the latest version is always available on the official Fortinet website , older versions require access through the or third-party repositories . Methods for Downloading Older Versions

Versions prior to 6.4.9 have known SSL VPN buffer overflow exploits (CVE-2022-40684, anyone?). If you are rolling back to fix a connectivity issue, make sure your Firewall (FortiGate) is patched to block the exploit attempts. Otherwise, you are rolling out a red carpet for hackers.