In response to a ransom threat in which hackers are claiming to have access to more than 600 million iCloud accounts, Apple told Fortune there have been no breaches of its systems.
Instead, if the hackers do have access to iCloud accounts, Apple suggests previously compromised third-party services are at fault. From an Apple spokesperson:
There have not been any breaches in any of Apple's systems including iCloud and Apple ID," the spokesperson said. "The alleged list of email addresses and passwords appears to have been obtained from previously compromised third-party services."