Cross-site scripting (XSS) vulnerability in the Forms/rpSysAdmin script on the Zyxel Prestige 660H-61 ADSL Router running firmware 3.40(PT.0)b32 allows remote attackers to inject arbitrary web script or HTML via hex-encoded values in the a parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/28021
http://www.vupen.com/english/advisories/2006/3012
http://www.securityfocus.com/archive/1/441193/100/0/threaded
http://www.eazel.es/media/advisory004-Zyxel-Prestige-660H-61-Cross-Site-Scripting.html
http://securitytracker.com/id?1016598