Cyber security expert Paul Haskell-Dowland warns that although internet connected home devices alone do not pose a threat to security – there is a risk that they could be used as a portal to personal information. This information is then sent into the cloud, with permission given to people that we don’t know to process the data. 

http://www.abc.net.au/news/2017-12-20/google-homeamazon-tech-devices-threat-to-personal-data/9273550