My airport extreme was hacked into. How do I repair the problem?

I would recommend that you perform a "factory default" reset on your AirPort to get it back to its "out-of-the-box" configuration, and then, use the AirPort Utility to configure it as required. Be sure to use the "WPA2 Personal" option for Wireless Security and use a strong password.

Also, I recommend that you change the default Base Station Administrator password from public to something that only makes sense to you.

It shows up under available networks under a name I didnt give it.

Something like Apple Network xxxxxx, for example?

If no, please follow the instructions from Tesserax

Is the name Apple Network fbabe6,or just fbabe6?

This information indicates that your AirPort has been reset back to factory default settings. This can sometimes happen during a power outage or other type of power loss.

If you find that the AirPort will not hold its settings, then it may be defective and you should take it to an Apple store to verify.....if you have one in your area.

Remember.....hackers do not want you to know that they are on your network, so they try to make things appear as normal as possible. They would not be changing the name of your network if they wanted to to use it or try to obtain any data from your computers.