Weak security message

The weak security is referring to your router. You need to change the security settings there.

Hi Mew253,

Thank you for posting in the Apple Support Communities. We understand you are unable to create an iCloud backup of your iPhone due to network security issues.

You may need to utilize a different network or a computer to create the backup. However, the following resource will help you ensure your networking hardware is set up correctly.

• Recommended settings for Wi-Fi routers and access points

You'll find helpful steps to create your backup here.

• If you can't back up to iCloud or restore from iCloud backup failed

The next resource will help you explore options and steps to create your device backup.

• How to back up your iPhone, iPad, and iPod touch

Cheers!

Hey there Mew253,

Is your network set to WPA2-AES or WPA3 as discussed in the resource we shared? You may need to work directly with your ISP to help ensure proper settings.

If more help is needed, you'll want to Contact Apple Support.

Have a good one!