Yahoo said on Tuesday All 3 billion accounts of Yahoo’s users as of 2013 were affected by a data theft the company originally said had only affected 1 billion users.In 2016, Yahoo disclosed that more than one billion of about three billion accounts had likely been affected by the hack. In its disclosure Tuesday, the company said all accounts were likely victimized.
The statement said that the estimate is based on “new intelligence” following an investigation with the assistance of outside forensic experts into the incident in August 2013.
That makes the Yahoo hack far and away the largest in history, and further dents the reputation of an Internet pioneer that was forced to sell itself off after a succession of CEOs failed to revitalize its user and revenue growth as Facebook and Google grew to dominate the digital ad market.
In 2013, a breach allowed attackers to steal email addresses, passwords, birth dates, telephone numbers and more. The new investigation indicated that stolen information didn’t include passwords in clear text, payment card data or information about bank accounts.
Verizon finished its acquisition of Yahoo in June and is folding it, with AOL, under a new subsidiary named Oath.