Panasonic Arbitrator Back-End Server (BES) MK 2.0 VPU before 9.3.1 build 4.08.003.0 when USB Wi-Fi or Direct LAN is enabled and MK 3.0 VPU before 9.3.1 build 5.06.000.0 when Embedded Wi-Fi or Direct LAN is enabled does not use encryption which allows remote attackers to obtain sensitive information by sniffing the network for client-server traffic as demonstrated by Active Directory credential information.