ALERT: Some TalkTalk supplied modems have been hacked
Link to the news source: http://www.bbc.co.uk/news/technology-38167453
I had this issue myself as I used the D-Link 3780, and I've had to swap to a backup, as every time I booted it up, even after resetting, the login for the router got changed instantly, and I had an awful connection speed. So watch out! Swapped over to my trusty Netgear for now (it doesn't have wireless, but at least it hasn't been hacked.... yet)
Re: ALERT: Some TalkTalk supplied modems have been hacked
And the crooks would have gotten away with it if they hadn't saturated links to cause a slowdown.
... assumine they did it for DDoS botnet reasons & screwed up their code.