Yahoo confirms data breach of 400,000 accounts

Friday, July 13, 2012
Boston: In a major security breach web giant Yahoo Inc. has reported the theft of some 400,000 user names and passwords to access websites including its own asserting that hackers had taken advantage of a security vulnerability in its computer systems. 

A hacker group proclaiming itself as D33DS posted online a massive trove of data that was said to be unencrypted in a file pilfered from the Sunnyvale, California-based internet pioneer "as a wake-up call not as a threat."

Yahoo spokeswoman Dana Lengkeek did not responded to a request asking her to identify the companies whose credentials were stolen. Officials with Google, AOL and Microsoft could not immediately be reached for comment.

Yahoo did not has disclosed how many passwords were valid or say how many of the stolen logins were for Yahoo's sites.

According to media reports Yahoo has apologized for the breach in a written statement, responding to the latest piece of bad news for a company that has lost two chief executives in a year and is struggling to revive stalled revenue growth. 

Notably, the theft comes in the wake of a breach reported last month by the business networking service LinkedIn which resulted in the release of some 6.4 million member passwords.
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