Apple has issued a warning to iPhone and iPad users about a potential security threat, urging them to update their devices immediately. This comes as some older software versions are being targeted in ongoing attacks. The warning appears as a ‘Critical Software’ notice inside the Settings app. Once a device is infected, hackers can access personal data, including contacts, photos, messages, location, call history, and saved passwords. The threat is particularly acute for users who have not updated their software. Some attackers are using phishing emails to trick users into clicking harmful links.