Hackers breached automatic tank gauge systems used to monitor fuel levels in underground storage tanks at gas stations across the United States.
These systems were connected to the internet but lacked basic security protections such as passwords.
U.S. officials suspect Iranian hackers. The intruders could view and alter the readings on tank monitors but could not change actual fuel amounts or cause physical damage or operational disruptions.
The main concern is that attackers could mask a real fuel leak by falsifying data, creating safety or environmental hazards. No such incidents have been reported.