TRENDnet TEW-823DRU devices with firmware before 1.00b36 have a hardcoded password of kcodeskcodes for the root account, which makes it easier for remote attackers to obtain access via an FTP session.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-8416
http://hackingcomtapioca.blogspot.com.br/2014/10/hacking-trendnet-tew-823dru.html