ZyXEL Prestige routers, including P-660, P-661, and P-662 models with firmware 3.40(PE9) and 3.40(AGD.2) through 3.40(AHQ.3), do not use a salt when calculating an MD5 password hash, which makes it easier for attackers to crack passwords.Referenceshttp://www.securityfocus.com/archive/1/489009/100/0/threadedhttp://www.gnucitizen.org/projects/router-hacking-challenge/http://www.procheckup.com/Hacking_ZyXEL_Gateways.pdf
