Yahoo was hit with another hack in August 2013 of over 1 billion accounts including names, emails, telephone numbers, and birth dates, although Yahoo says no credit card details were stolen as they are on a different system. The theft may also include unencrypted security questions.
Yahoo says users should visit the Safety Center [safety.yahoo.com
For the latest news on the issue, see Yahoo's Security notice December 14, 2016 [help.yahoo.com
Previous data breach coverage Yahoo Investigates if Some Employees Knew About Data Breach in 2014
Can it get any worse for Yahoo?