Arris routers SBR-AC1900P 1.0.7-B05, SBR-AC3200P 1.0.7-B05 and SBR-AC1200P 1.0.5-B05 were discovered to contain a command injection vulnerability in the pppoe function via the pppoeUserName, pppoePassword, and pppoe_Service parameters. This vulnerability allows attackers to execute arbitrary commands via a crafted request.