Yahoo security breach bigger than initially thought

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(WTVY) According to Yahoo, every single user account that existed in 2013 is impacted.
The company, now part of Verizon, recently obtained new intelligence about the massive breach.
Last December, Yahoo initially disclosed that more than 1 billion accounts existing in 2013 had been breached.
They now say all of their 3 billion user accounts were likely affected.
Yahoo directly notified impacted users to change their passwords and take other security measures.