Cayman 3220-H DSL Router 1.0 ship without a password set, which allows remote attackers to gain unauthorized access.
https://exchange.xforce.ibmcloud.com/vulnerabilities/6841
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-1410
http://www.securityfocus.com/bid/3017
http://www.securityfocus.com/archive/1/196083