The administration interface in the Planet VC-200M VDSL2 router allows remote attackers to cause a denial of service (administration interface outage) via an HTTP request without a Host header.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36155
http://www.securityfocus.com/bid/25390
http://www.securityfocus.com/archive/1/477253/100/0/threaded
http://securityvulns.ru/Rdocument847.html