20092 seems pretty simple to do with LAN access, Telnet access in 20091 is the higher risk one as anyone can Telnet into the device after injecting a configuration change.
And Telus here in Canada is pushing for people to use this router over the superior Actiontec T3200M. People report the Arcadyan firmware on the Telus includes a lot of engrish, like “the 60 seconds wait for wifi synchronization” or “Unknow error”