The United States Secret Service says the hackers are able to get around caps on ATM withdrawals.
That allows them to take out more money than customers have in their bank accounts.
Small and medium-sized banks are said to be the most vulnerable.
The United States Secret Service says the hackers are able to get around caps on ATM withdrawals.
That allows them to take out more money than customers have in their bank accounts.
Small and medium-sized banks are said to be the most vulnerable.