Certain Linksys WiFi routers might be sharing far more data than their users would like. Security researcher Troy Mursch has reported that 33 models, including some Max-Stream and Velop routers, are exposing their entire device connection histories (including MAC addresses, device names and OS versions) online. They also share whether or not their default passwords have changed. Scans have shown between 21,401 and 25,617 vulnerable routers online, 4,000 of which were still using their default passwords.