As many as 235,000 U-verse routers and gateways could be vulnerable, researcher says. Arris acquired Motorola’s Home business line from Google in 2013. The latest firmware update for the NVG589 and NVG599, version 9.2h0d83, has hard-coded credentials that can be used to access cshell, a Unix shell client. About 220,000 devices may be vulnerable to this issue, although precise statistics are difficult to generate because the service runs on an uncommon port.”]
Source: https://www.careersinfosecurity.com/researcher-att-routers-be-easily-compromised-a-10255