Wi-Fi is saying week security

Yep, ignore recent vulnerability found in wpa2 and router chips.

Good idea.

https://www.google.com/amp/s/www.zdnet.com/google-amp/article/wpa2-security-flaw-lets-hackers-attack-almost-any-wifi-device/

https://www.infosecurity-magazine.com/news/wireless-router-chipsets-bypass/

Change your router settings to more secure settings.

https://support.apple.com/en-us/HT202068

You can ignore this message if you have a WPA2 setup with a password, but if your network doesn't have a password, it's best if you set one, so that strangers can't log into your WiFi.