source: http://www.securityfocus.com/bid/39646/info

The Huawei EchoLife HG520 is prone to an information-disclosure vulnerability.

Attackers can exploit this issue to obtain sensitive information that may lead to further attacks.

The following Huawei EchoLife HG520 firmware and software versions are vulnerable:
Firmware 3.10.18.7-1.0.7.0, 3.10.18.5-1.0.7.0, 3.10.18.4
Software Versions: V100R001B120Telmex, V100R001B121Telmex 

http://www.exploit-db.com/sploits/33869.tar.gz