A command injection vulnerability in RG-EW series home routers and repeaters v.EW_3.0(1)B11P219, RG-NBS and RG-S1930 series switches v.SWITCH_3.0(1)B11P219, RG-EG series business VPN routers v.EG_3.0(1)B11P219, EAP and RAP series wireless access points v.AP_3.0(1)B11P219, and NBC series wireless controllers v.AC_3.0(1)B11P219 allows an authorized attacker to execute arbitrary commands on remote devices by sending a POST request to /cgi-bin/luci/api/cmd via the remoteIp field.