Do we really have to worry about this flaw in Cisco router (see Cisco Security Advisory), as some article would like us to (1, 2)?

It seems to be only related to HTTP and FTP authentication and not to what mainly a router is doing: routing. Is the Internet really in danger ? I am not sure companies and ISP are mainly using Cisco routers for this kind of action, but maybe am wrong. Hopefully, some ISP are using other vendors for their Internet business, safe!