Cisco EPC3928 devices allow remote attackers to obtain sensitive configuration and credential information by making requests during the early part of the boot process, related to a "Boot Information Disclosure" issue, aka Bug ID CSCux17178.
https://www.exploit-db.com/exploits/39904/
http://www.securityfocus.com/bid/91541
http://www.securityfocus.com/archive/1/538627/100/0/threaded