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New Filing Confirms Yahoo Was Aware of Large-Scale Email Hack in 2014
In September, Yahoo confirmed that at least 500 million of its users' accounts had been compromised during an attack in late 2014. Now, in a recent filing with the Securities and Exchange Commission, it was revealed that the company knew about the hack when it originally happened in 2014, but waited two years to divulge it to the public (via TechCrunch)
Describing the investigation, the new SEC filing notes a "state-sponsored actor" who gained access to the company's network in late 2014, along with Yahoo's awareness and identification of the individual in question during the same time period. Information stolen included names, email addresses, telephone numbers, dates of birth, hashed passwords, and encrypted or unencrypted security questions and answers.