Symantec LiveUpdate 1.5 stores proxy passwords in cleartext in a registry key, which could allow local users to obtain the passwords.
https://exchange.xforce.ibmcloud.com/vulnerabilities/7013
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-0541
http://www.sarc.com/avcenter/security/Content/2001_07_20.html