If wireless network is hacked through WPS, hacker have only access to network, means he can use your internet for surfing. I think that in case of such hack only damage is in possibly slow internet, and in the fact that hacker can do bad things using your IP address.
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Not true,
If wireless network is hacked it will be much more easier for the hacker to hack all devices on the local network.
Besides, if someone is too lazy to turn off WPS, there is high chances he forgot to change the default password for his router.
I don't quite get the logic behind @Lucius's statement, it's like saying if a thief breaks into your house through the window, it's different from breaking in through the door in terms of what the thief can do AFTER they are already INSIDE your house !
maybe he confused WPS with something else, because after all once somebody is within your LAN it does not matter HOW they got there.
it's also wrong to assume that the hacker needs access to your router's details, being on the same subnet alone is a huge advantage, not even your wired devices are safe, there are many ways of stealing your data once a pro hacker is connected to your network, one of the old school yet still effective attack are called man-in-the-middle attack, with a bit of skills and the right piece of software, the hacker will start to router every packet within your network.
an example of this, lets assume you are trying to access your online wallet , packets have to travel in this route "approx"
Your PC/Phone <> router <> your ISP <> wallet server's ISP <> wallet server's router <> wallet server
after a successful attack here is how the route would be
Your PC/Phone <>
Hacker's PC<> router <> your ISP <> wallet server's ISP <> wallet server's router <> wallet server
he will be able to intercept every little piece of information , of course encryption and other security measurements will be in his way, but having access to all that traffic/packets is a huge advantage for the hacker.
many people take these stuff for granted, using cheap routers with cheap security , no firewalls , public dns ,tons of open ports and many other doors are kept open for hackers to make use of.