Weak security

Typically that means that you are using a public WiFi network. Those networks are shared by hundreds and hundreds of people and are not secure. I use them all the time but I don’t do banking, purchasing or anything that would require giving out personal information. If you are just web browsing, reading email, streaming a video, etc., you are OK.

In simple terms, your iPhone is saying that the wifi network is using a password type (probably WEP) that's not considered secure.

Password for wifi networks should be WPA2 Personal (AES) security type.

Regards

Giulio

If your computer is connected to the wifi network ... then yes, it's weak for all devices connected.

How to change the password type?... well, it's a setting that must be changed on your modem-router, generally it's under SSID (but it depends on your modem router model).

If you're not able to manage settings, call a friend who can do it, or contact the modem router manufactorer.

Your you got the modem router from your internet provider, contact the provider.

Regards and best of luck

Giulio

That means the WiFi network you're connected to uses a weak encryption system that is easily compromised.

Contact the network administrator.