The web component in Philips Electronics VOIP841 DECT Phone with firmware 1.0.4.50 and 1.0.4.80 has a back door "service" account with "service" as its password, which makes it easier for remote attackers to obtain access.
https://www.exploit-db.com/exploits/5113
http://www.vupen.com/english/advisories/2008/0583
http://www.securityfocus.com/bid/27790
http://www.securityfocus.com/archive/1/488127/100/200/threaded
http://securityreason.com/securityalert/4536
http://secunia.com/advisories/28978
http://archives.neohapsis.com/archives/bugtraq/2008-02/0227.html