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D-Link did not make any effort to contact the security researcher even after the initial advisory was published, but it posted its official answers and patches on their website that the security researcher found "by chance".
Normally when it comes to upgrading router firmware, I tend to steer people away from the manufacturer’s firmware toward alternative, open source alternatives, such as DD-WRT or Tomato.
Most stock router firmware is fairly clunky and barebones (or includes undocumented “features” like the one discussed in this post); I have long relied on DD-WRT because it comes with comes with all the bells, whistles and options you could ever want in a router firmware, but it generally keeps those features turned off by default unless you switch them on.
“Realizing that the web server already had all the code to change these settings, they decided to just send requests to the web server whenever they needed to change something.
The only problem was that the web server required a username and password, which the end user could change.” Updating an Internet router can be tricky, and doing so demands careful attention; an errant click or failure to follow closely the installation/updating instructions can turn a router into an oversized paperweight in no time.