Showing weak security

This is NOT an iPhone problem; it is a problem with your router settings.

A "Weak Security" notification means that your Wi-Fi router is not configured correctly. There is a new feature in iOS 14 that checks and displays a message if your router is not using the most up-to-date security settings. Note that your router has always had weak security, you just didn’t know about it until now. 

See this Apple support article for how to configure it correctly—>Recommended settings for Wi-Fi routers and access points - Apple Support, specifically the section headed Security. And don't forget to configure your range extenders (if any) also!

After you change the router settings you should Forget the network in your phone settings and reconnect.

Note also that weak security does not interfere with using Wi-Fi, it is just a warning. Your Wi-Fi should still work normally, and, if it doesn’t, it is not because of the weak security message.

• Login to your hub via 192.168.0.1 or whichever address your router uses.
• Enter your admin name and password (this is printed on a sticker on the hub if you haven’t changed the password)
• Once logged in, go to Advanced settings > Wireless > Security
• Click on the dropdown next to Security and change it to WPA2-PSK (note you’ll need to do this for both the 2.4 GHz & 5 GHz network if you’ve separated these)
• Once you hit save the hub will refresh and when it reconnects the WiFi you should find the message has disappeared

That works for your router, but all routers are different, both the IP address to access the router and the menus once you log in.

Change the security settings on your router.

Google the maker and model to find the steps.

I’m sure users will be able to find the settings under their own router. :)

I’m offering general information on what to look for & change.

My reply wasn’t so much for you, as for other viewers who follow your instructions and it doesn’t work for them. Most users don’t know much about their routers.

No problem. :)