Apple has stated in an email to AFP that it "has never worked with the NSA to create a backdoor in any of our products, including iPhone".
Security researcher Jacob Applebaum told a security conference in Germany that a program named DROPOUTJEEP allowed the NSA to intercept SMS messages, access contact lists, locate a phone using cell tower data, access voice mail and even operate the iPhone's microphone and camera.
A huge problem
DROPOUTJEEP was initially supposed to be installed via "close access methods," according to one of the NSA documents, from 2008, that was leaked by Der Spiegel. That suggests iPhones had to be physically close to get the snooping software on the devices.
Cluley wrote the document "does not mean that the NSA has complete control of your iPhone" because physical access to the device would be needed.
"It may be that they have since found unpatched vulnerabilities in iOS to install the spyware onto targeted devices remotely... but that's not what the leaked documents say," Cluley wrote.
Cluley also noted that the document dates from 2008. He added: "Let's hope that Apple has improved its software's security since 2008. And if it's not true, we've all got a huge problem."