Sony PCS-XG100, PCS-XG100S, PCS-XG100C, PCS-XG77, PCS-XG77S, PCS-XG77C devices with firmware versions prior to Ver.1.51 and PCS-XC1 devices with firmware version prior to Ver.1.22 allow an attacker on the same network segment to bypass authentication to perform administrative operations via unspecified vectors.