Cisco ONS15454 and ONS15327 running ONS before 3.4 stores usernames and passwords in cleartext in the image database for the TCC, TCC+ or XTC, which could allow attackers to gain privileges by obtaining the passwords from the image database or a backup.
http://www.securityfocus.com/bid/6078
http://www.iss.net/security_center/static/10506.php
http://www.cisco.com/warp/public/707/ons-multiple-vuln-pub.shtml