A hacker and reverse-engineer from France has discovered an administration password Reset vulnerability in many Netgear and Linkys Routers. During Christmas Holidays he forgot the admin interface password of his Linksys WAG200G router and in an effort to gain access back of its administration panel, he first scanned the Router and found a suspicious open TCP port i.e. 32764. He found was a secret backdoor interface that allowed him to send commands to the router from a command-line shell without being authenticated.
Source: https://thehackernews.com/2014/01/hacking-wireless-dsl-routers-via.html