Researchers discovered what they're describing as a potential security issue that could affect a billion devices.

Researchers have found undocumented commands in a popular bluetooth chip which is inside over a billion devices worldwide. The secret commands are in the ESP32 chip, which is made by Espressif. The commands could allow attackers to spoof devices,

Undocumented commands in a popular Bluetooth chip could allow hackers to spoof devices and access data.

Researchers warn these commands could be exploited to manipulate memory, impersonate devices, and bypass security controls.

Bluetooth technology presents significant security risks, with cybercriminals capable of exploiting vulnerabilities

The ubiquitous ESP32 microchip made by Chinese manufacturer Espressif and used by over 1 billion units as of 2023 contains undocumented commands that could be leveraged for attacks.