Independent researchers identified the flaw, which lets hackers access devices through the iMessage service even if users do not click on a link or file.
The problem affects all of the technology giant’s operating systems, the researchers said. The researchers said that the previously unknown vulnerability affected all major Apple devices, including iPhones, Macs, and Apple Watches.
In a statement to a news agency, NSO did not confirm or deny that it was behind the spyware, saying only that it would “continue to provide intelligence and law enforcement agencies around the world with life-saving technologies to fight terror and crime”.
Security experts have said that although the discovery is significant, most users of Apple devices should not be overly concerned as such attacks are usually highly targeted.