After unauthorized activity on its network revealed the personal data of some customers in South Korea and Taiwan, McDonald's has become the latest corporation to be struck by a data breach.

According to the company, the problem was swiftly discovered and contained, and a comprehensive investigation was conducted.

“While we were able to rapidly disable access following the identification, our investigation revealed that a small number of files were read, some of which contained personal data,” the burger business claimed.

McDonald's said its review found that only South Korea and Taiwan had customer personal data accessed and that it would contact regulators and any affected consumers. There was no information about a customer's payment method disclosed.

McDonald's stated it will examine the findings of the inquiry, as well as advice from security resources, to determine how to improve its current security measures.

Cybercriminals are targeting businesses in a variety of industries, including some high-profile examples in recent weeks.

JBS SA, the world's largest meat processing company, announced on Wednesday that it had paid hackers who stole into its computer system last month the equivalent of 11 million dollars (£7.8 million).

Colonial Pipeline, which transports about half of the fuel consumed on the US East Coast, paid a ransom of 75 bitcoins — nearly £3 million at the time — last month in the hopes of restoring service to its system.

The Justice Department said on Monday that it had collected the majority of the ransom money.