On Friday, Samsung revealed that earlier this year, hackers gained access to its computer systems in the United States and stole the personal information of some of its customers.

A consumer alert from the South Korean software giant reveals that in July, a hacker gained access to the company’s networks and stole data. Samsung discovered a data breach affecting some of its customers in early August.

Since then, the corporation claims it has hired a third-party cybersecurity firm, secured the compromised systems, and is cooperating with law police.

Information such as names, addresses, phone numbers, email addresses, birthdays, and product registration data may have been compromised, Samsung said. More sensitive information, such Social Security numbers and credit card details, remained safe.

Noting that it is in the process of alerting concerned users, Samsung did not reveal how many customers were affected.