Smart-home devices, such as televisions and streaming boxes, are collecting reams of data — including sensitive information such as device locations — that is then being sent to third parties like advertisers and major tech companies, researchers said Tuesday.

As the findings show, even as privacy concerns have become a part of the discussion around consumer technology, new devices are adding to the hidden and often convoluted industry around data collection and monetization.

A team of researchers from Northeastern University and the Imperial College of London found that a variety of internet-connected devices collected and distributed data to outside companies, including smart TV and TV streaming devices from Roku and Amazon — even if a consumer did not interact with those companies.