From theguardian.com
![Apple logo](https://i.guim.co.uk/img/media/d992fd3478f11b9eb84bd97c18b810447c3c00bc/0_381_5760_3456/master/5760.jpg?width=300&quality=85&auto=format&fit=max&s=032052f3497563fc1a3ed86413bfd907)
Apple users are being warned to exercise particular caution over their cybersecurity for the next few days, after the company mistakenly reopened a security flaw in the latest version of iOS.
In iOS 12.4, released last month, Apple fixed a number of security bugs, as well as enabling support for the Apple Card in the US. But in doing so, the company accidentally reversed a security fix it had previously patched in iOS 12.3 at the end of April.
That vulnerability, discovered by Google’s bug-hunting team Project Zero, theoretically allows “a malicious application … to execute arbitrary code with system privileges”. In other words, if exploited, a malicious application can gain complete control over an iPhone – a dream for hackers and spies the world over.