Cisco Systems VPN Client is a software application for connecting to virtual private networks based on Internet Key Exchange version 1.

[4] The Support page with documentation links was taken down on July 30, 2016, replaced with an Obsolete Status Notification.

The software is not free but is often installed on university and business computers in accordance with a site-license.

As with most corporate licenses, administrators are allowed to freely distribute the software to users within their network.

A vulnerability has been identified,[9] and those passwords can easily be decoded using software or online services.