We first got a glimpse at the BlueBorne vulnerability back in September, when it was revealed that that Bluetooth-based attack vector was exploitable on phones, computers, and IoT devices — basically, anything with a Bluetooth radio. BlueBorne was especially nasty since it is capable of man-in-the-middle attacks and remote code execution.

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Source: Hot Hardware – BlueBorne Exploit Could Have Exposed 20 Million Amazon Echo And Google Home Devices To Bluetooth Attacks