Cisco Virtual Private Network (VPN) Client software 2.x.x, and 3.x before 3.5.1C, allows local users to use a utility program to obtain the group password.
https://exchange.xforce.ibmcloud.com/vulnerabilities/10044
http://www.securityfocus.com/bid/5650
http://www.cisco.com/warp/public/707/vpnclient-multiple2-vuln-pub.shtml