Privacy experts say the scanning system sets off a number of concerns for ordinary users.

There are reports hackers have been exploiting the bugs.

Signal uncovered the apparent security gaps in a company that makes a living breaking into smarphones.

Two of the bugs affect the kernel, in the core of the device’s operating system.

It highlights the big payouts Apple has been offering through a bug bounty program it expanded last year.

Researchers from ZecOps say they have found two zero-day vulnerabilities that have been exploited in Apple’s iOS Mail application.

It's the latest payout in Apple’s bug bounty program, which the technology giant expanded last year.

The app is available for $4.99 in the iOS store.