In the past 24 hours, we've seen a spike in complaints from people who say their PCs, Macs and servers were taken over via the widely used remote-control tool on their machines. Even users with strong passwords and two-factor authentication enabled on their TeamViewer accounts say they were hit.

http://www.theregister.co.uk/2016/06/01/teamviewer_mass_breach_report/ 

https://www.meneame.net/story/teamview-niega-haya-sido-hackeada-montones-pcs-secuestrados-eng