https://techcrunch.com/2017/10/17/microsoft-already-published-a-krack-fix-apple-and-google-are-working-on-it/

Security researcher Mathy Vanhoef publicly disclosed a serious vulnerability in the WPA2 encryption protocol yesterday that affects all devices that use WiFi. While we’ve listed many ways to protect yourself against KRACK, the best way to completely eradicate it from your network is to update all your WiFi devices. And some companies have been faster than others.

First, you should update your WiFi access point. If you’re using your default ISP router, there’s not much you can do about it. Ask the company if they patched it, look for the user guide to find out how you can access the configuration panel and force an update.