On social media right now, strong rumours are spreading that the WPA2 encryption scheme has been broken in a fundamental way. What this means: the security built into WiFi is likely ineffective, and we should not assume it provides any security.
The current name I’m seeing for this is “KRACK”: Key Reinstallation AttaCK. If this is true, it means third parties will be able to eavesdrop on your network traffic: what should be a private conversation could be listened in to.
This has happened before with WiFi: who remembers WEP passwords? However, what is different this time around: there is no obvious, easy, replacement ready and waiting. This is suddenly a very big deal.