NEW YORK — Usernames and passwords of some of Yahoo's email customers have been stolen and used to gather personal information about people those Yahoo Mail users have recently corresponded with, the company said Thursday.
Yahoo didn't say how many accounts have been affected. There are 273 million Yahoo mail accounts worldwide, including 81 million in the U.S.
It's the latest in a string of security breaches allowing hackers to nab personal information. Up to 70 million customers of Target stores had their personal information and credit and debit card numbers compromised late last year. Neiman Marcus was the victim of a similar breach in December.
“It's an old trend, but it's much more exaggerated now because the programs the bad guys use are much more sophisticated now,” says Avivah Litan, a security analyst at the technology research firm Gartner.
Yahoo Inc. said in a blog post that the information sought seems to be names and email addresses from recently sent emails.