Westermo MRD-315 1.7.3 and 1.7.4 devices have an information disclosure vulnerability that allows an authenticated remote attacker to retrieve the source code of different functions of the web application via requests that lack certain mandatory parameters. This affects ifaces-diag.asp, system.asp, backup.asp, sys-power.asp, ifaces-wls.asp, ifaces-wls-pkt.asp, and ifaces-wls-pkt-adv.asp.