https://wccftech.com/security-researcher-exploits-find-my-network-in-order-to-send-messages/

Apple's Find My Network offers tight integration with the company's products. It is essential if you have lost your iPhone, iPad, and even your Mac. While the network is quite secure, a security researcher was successfully able to exploit the system and used it to send messages as well as other data. Scroll down to see more details on the scenario.

A security researcher by the name of Fabian Bräunlein has found an exploit in Apple's Find My network and used it as a transfer medium. The exploit allows devices with no internet connection to upload arbitrary data using nearby Apple devices in order to send messages and upload data. Since Find My network uses other active iOS devices to act as nodes to transfer location data, the security researcher was able to send messages.