TransUnion says 4.4 million consumers' data compromised in hack

By Raphael Satter

WASHINGTON, Aug 28 (Reuters) - Credit bureau TransUnion said Thursday that more than 4 million people's data was exposed in a recent hack involving an unidentified third party.

In a letter dated earlier this week and posted to the website of Maine's attorney general, the company said it had "recently experienced a cyber incident involving a third-party application serving our U.S. consumer support operations."

In a statement, TransUnion said it had "quickly contained the issue, which did not involve our core credit database or include credit reports."

Maine legally requires disclosures for certain kinds of breaches affecting its residents. The name of the third party application was not disclosed, but U.S. corporations have recently seen waves of compromises as hackers trick employees into opening up their respective employers' Salesforce databases.

A Salesforce representative did not immediately return a message seeking comment.