I saw a post at this website http://wccftech.com/teamviewer-hack-...-are-affected/, tells you how you can determine if your teamviewer account has been compromised.
How to confirm if you are also a victim of TeamViewer hack
If you are wondering whether your TeamViewer has also been hacked, head over to the TeamViewer Management Console website and log into your account. Click on your username in the top-right corner and then click on Edit Profile > Active Logins. This list will contain every device and location from where your account has been accessed.
For more details, you will have to access TeamViewer log files to see if anyone else has been using your account. Accessing QuickSupport logs differs on every operating system, here is how you access them on your Windows or OS X computer.
1- Access TeamViewer log files on Windows:
Click on the tool kit symbol in the upper right corner > Open Logfiles…
Open the files named ConnectionFirst.
TeamViewer full version + Host module log files on Windows:
Click on Extras in the menu > click on Open log files…
Open the files named Connections_incoming.txt and Connections.txt
2- How to open log files using Linux:
Run the command teamviewer -ziplog (with root).
Unzip the zip file and open the files named Connections_incoming.txt and Connections.txt
3- How to open log files using OS X:
Go to Applications > Utilities > Console to start the Console app.
Go to Files > ~/Library/Logs/TeamViewer and open Connections.txt
Once you open the log files, look for any logins that have been made using an IP address that is not yours. If there are logins from other locations, you are probably a victim of TeamViewer hack too. Also search the logs for “webbrowserpassview.exe,” and if you find a result, it’s time to change your password.
If you have been affected…
Change your password immediately,
Report to Team Viewer,
And enable 2-step authentication.
You can enable 2-step verification from Edit profile > General > Activate link > Two factor authentication. Follow the onscreen instructions and Save the changes.
Even if you haven’t been impacted, it is important to change your passwords if you have been using same passwords for the last few years. In the wake of latest password dumps, it has become even more important to make stronger password choices on every online account that you use.