This is the 16th documented in-the-wild zero-day exploitation of security defects in Apple’s iOS and macOS platforms so far this year.

“Apple is aware of reports that an exploit for this issue exists in the wild,” the company said without elaborating. No other details of IOCs (indicators of compromise) were provided.

The Cupertino, Calif. software giant credited researchers at Google with intercepting the new zero-day exploit, which affects a list of older iPhones and iPads running the out-of-support iOS 13 devices like the iPad Air, the iPad mini, iPhone 5s, iPhone 6, and iPhone 6 Plus.