Millions of mobile devices from eleven smartphone vendors are vulnerable to attacks carried out using AT commands, a team of security researchers has discovered.
AT (ATtention) commands, or the Hayes command set, is a collection of short-string commands developed in the early 1980s that were designed to be transmitted via phone lines and control modems. Different AT command strings can be merged together to tell a modem to dial, hang up, or change connection parameters.
Unknown to the common user is that modern smartphones include a basic modem component inside them, which allows the smartphone to connect to the Internet via its telephony function, and more.
Source: Bleeping Computer