The Federal Bureau of Investigation (FBI) warns not to use public charging stationsspace that have become increasingly popular in places such as airports and shopping malls.

The problem is that hackers have found a way to introduce malware into devices through these USB portsthe FBI said. “Avoid using free charging stations at airports, hotels or shopping malls,” the FBI’s Denver Twitter account said. “Bad actors have discovered ways to use public USB ports to introduce malware and surveillance software into devices. Bring your own charger and USB cable and use a wall socket instead.”

The FBI isn’t the only one warning to avoid USB charging stations. The Federal Communications Commission (FCC) also warns against its use on its website, saying hackers can load malware onto USB ports, giving them the ability to “maliciously” access devices.

“If your battery is low, please be aware that charging your electronic device at charging stations with free USB ports, such as at airport gates, in hotels and other travel-friendly places, may have consequences. Unfortunate,” the FCC said. .

The FCC warns that such malware can give criminals access to personal information and passwords, which they can use personally or sell to other actors. Instead of using public USB charging stations, the FCC suggests that people use a portable charger or plug in the device to an outlet.