Aflac says hackers may have stolen customers' claims info, including Social Security numbers

Aflac on Friday said hackers have gained access to its customers personal information in a cybersecurity attack last week.

The company, which provides millions of customers with accident, life and health insurance policies, confirmed the June 12 incident in a statement on Friday, saying it was committed by a "sophisticated cybercrime group" that used "social engineering tactics" to gain access to its network. 

While Alfac said it's unable to determine how many people have been affected as of yet, it noted that claims information, health information, Social Security numbers and other personal information were possibly compromised.