Glad you asked...
If hacking was a simple as looking up how to do it on the internet, then everyone would be a hacker by now. People will not tell you how to hack into their servers and you probably really only want to know so you can cause trouble. If you want to learn how, go and study computers in college.
Then again, this answer might help you...
The most obvious and most used hack is to penetrate through the teamspeak server admin panel. This is usually done through brute force attempts. These hackers use software designed to submit logins over and over into your server.

