Command Injection vulnerability in appdatacenter on Shenzhen Tenda Ac9 USAC9V1.0BRV15.03.05.14multiTD01, Ac9 ac9kfV15.03.05.19(6318)cn, Ac15 USAC15V1.0BRV15.03.05.18multiTD01, Ac15 USAC15V1.0BRV15.03.05.19multiTD01, Ac18 USAC18V1.0BRV15.03.05.05multiTD01, and Ac18 ac18kfV15.03.05.19(6318)cn devices allows remote unauthenticated attackers to execute arbitrary OS commands via a crafted cgi-bin/luci/usbeject?devname= GET request from the LAN. This occurs because the "subA6E8 usbejectprocessentry" function executes a system function with untrusted input.