Cisco VPN Client Privilege Escalation

The Cisco VPN Client for Windows has a privilege escalation vulnerability that allows a regular user to gain system right.
http://www.cisco.com/warp/public/707/cisco-sa-20060524-vpnclient.shtml
Makes you wonder, if you’ve “locked down” your user permissions, how many of the really dangerous ones haven’t already promoted themselves to admin through privilege escalation vulnerabilities like this.