Someone broke into my WPA2 network

This has me a little rattled. I went in to check something else in the dd-wrt settings when I noticed an unfamiliar device on the WLAN. How was someone else on my network when I have WPA2 AES enabled? I've now changed my key and also turned on the mac filter. Not sure what else to do. I've never given out my network password to any neighbors. Took a screenshot of the MAC.

 

Although anything is possible hacking into WPA2 protected network is extremely unlikely.
Make sure it wasn't one of smartphones used by someone in the family or similar devices.
IP lease time is usually 24h and can be increased so it's possible that a member of your family used a smartphone yesterday (or so) and you've seen it today when no one was around.

I'm not saying it's not a hack but since it's very unlikely you should probably start by looking at other options/explanations.

 

I'm currently living alone in an apartment. My phone is an old Nokia. The only wifi devices are the notebook and printer, both of which have different mac id's to the foreign one.

 

Buffalo router by any chance?

 

It's an Asus.

 

If I remember correctly WPS works only on Buffalo DD-WRT routers.
No other DD-WRT edition has it. Still worth checking because of this.

 

That's a good news after all.
Far better than being hacked...

 

Wait, what was the outcome, here?