Will an iPhone that cannot update the software be exposed to personal data leakage or security?

It entirely depends on how you use it.

If iOS updates are no longer being released for your device, it typically means that the device has reached its end of life in terms of software support from Apple. In such cases, there are a few options you can consider:

1. Although major iOS updates may no longer be available, Apple may continue to release security updates for older devices. Ensure that your device is running the latest available version of iOS for its generation to maintain the highest level of security.
2. As iOS versions advance, some newer apps may not be compatible with older iOS versions. You may need to rely on older versions of apps or find alternative apps that are compatible with your device's iOS version.
   1. Ask the App developer to release the app for lower iOS versions also. Netflix & Amazon has done it.
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3. If your device is no longer receiving software updates, it may be a good time to consider upgrading to a newer device that is supported by the latest iOS updates. Upgrading to a newer device will ensure that you continue to receive the latest features, security updates, and app compatibility. Selection of a mobile model/brand is driv… - Apple Community

Remember to regularly back up your data to avoid losing any important information during the transition to a new device.

It's worth noting that the availability of updates and options may vary depending on the specific device model and its hardware capabilities.

YUS99_ Said:

"Will an iPhone that cannot update the software be exposed to personal data leakage or security?: A device that cannot update the software will be exposed to personal data leakage or security? can anyone explain"

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Troubleshooting Obsolete Devices:

Eventually, it will be come vulnerable. Apple and other Developers (i.e. Microsoft) typically provide updates for 7 years, and then stop providing them. Once that 7 years has completed, take that a good reason to upgrade to a newer model. IMPORTANT: Get the new device from Apple and none other, as a way to avoid scams and such.

For future reference...

Securing a Stollen iPhone:

A. Lock with Find My:

Erase this: Erase a device in Find My on iPhone - Apple Support. You'll likely never get it back. So, I'd say erase it.

B. Secure your Info:

If concerned for device access, then (A)verify your devices, and (B)modify your credentials. Open a new eMail address and use that for your Apple ID.

1. Verify your Devices:

Verify that all devices are logged in to your account, by using this link: Check your Apple ID Device List to See where you're Signed in - Apple Support

then...

2. Modify your Credentials:

Having been stollen, someone lily has your credentials. So, by all means, modifying them.

• Modify: your login credentials (Using Both a New eMail and a New Password for each and all sites)
• Associate: a different method of payment to your account
• Enable: Two-Factor Authentication for Apple ID and for all other accounts that have such an applicable option

C. Report Items to Apple and Others:

So, report phone call's and messages info to Apple and others. Use my User: Using the Photos App to Report Scams - User Tip