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Yahoo says second hack affected more than 1 billion in 2013

Bloomberg Published on Thu, Dec 15, 2016 / 9:10 AM GMT+8

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(Dec 15): Yahoo! Inc. disclosed a second major security breach that may have affected more than 1 billion users, another blow to the company’s reputation as it nears the sale of its main web businesses to Verizon Communications Inc.

The company said in a statement Wednesday that it hasn’t been able to identify the “intrusion” associated with this theft by a third party in August 2013. The event was unearthed by forensic experts after law enforcement investigators warned the company about a potential breach. Yahoo has said it has about 1 billion users.

Yahoo said it believes the incident “is likely distinct” from the hack the company disclosed in September. The shares dropped as much as 2.6 percent in extended trading after the announcement.