(RNN) - A vulnerability that could allow hackers to take over Apple devices by sending a picture has software security experts warning people they should immediately download updates.
According to a report by security company Cisco Talos, a BMP or TIFF photo file sent by email could contain harmful code that gives a criminal total access to an iPhone or Mac.
Apple has not commented on the security flaw, which Cisco Talos first revealed last week, but it previously released a patch that referenced the company's research.
Any owner of an iPhone older than 9.3.3 for the iOS can manually download the patch by going to Settings>General>Software Update, then hitting download and install.
Users of Macs earlier than 10.11.6 for OS X should download the patch by going to the Apple menu and clicking Software Update.
One of Apple's most notorious security failures was the 2014 iCloud hack that exposed hundreds of photos of celebrities, many of them nude shots of women.