Epsilon Data Management, LLC

New York City -- For the second month in a row, Best Buy had to tell customers that their email addresses were compromised.

The chain said that a former business partner’s files containing email addresses of some Best Buy customers were accessed without authorization. Best Buy said it would take legal action but it did not name the vendor involved.

NEW YORK -- If consumers were hesitant about providing personal information to retailers, they have even more reason to be paranoid as marketing firm Epsilon reported a number of breaches at several of its clients.

New York City -- Walgreens said a marketing and communications vendor that it uses, Epsilon, has informed the company about unauthorized access to its customers' email addresses, the Associated Press reported. The retailer joins JPMorgan Chase & Co. and grocery operator Kroger Co., which also use the same vendor to send emails, as the latest company to announce a breach of information.

In a statement, Walgreens said law enforcement authorities have been notified and are investigating the matter.