AMTT Hotel Broadband Operation System nlog_down.php command injection

A vulnerability has been found in AMTT Hotel Broadband Operation System 1.0 and classified as critical. Affected by this vulnerability is an unknown functionality of the file /manager/system/nlog_down.php. The manipulation of the argument ProtocolType leads to command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. Other parameters might be affected as well. The vendor was contacted early about this disclosure but did not respond in any way.