AT commands enable a clever person to mine data, overwrite the Android firmware to bypass the built-in security algorithms of the OS. AT commands are not the same across the devices, the team further investigates the number of total AT commands with as many devices and vendors they can get a hold with. They have indicated that around around 3,500 AT commands were available across devices. The University of Florida researchers are hoping with their responsible disclosure to device manufacturers, and effective patch can be issued soon to plug the AT command loophole.”]
Source: https://hackercombat.com/open-at-commands-a-huge-loophole-exploit-in-android-revealed/