Yahoo confirmed that over 200 million users account data was compromised in the past 2012. And now an unknown hacker or hacker group is trying to sell this hacked data on the Dark Web Marketplace. But, it's not clear that why Yahoo takes so long time to confirm this data breach.
This leaked data includes Yahoo users emails, usernames, secondary emails, zip codes, date of birth & encrypted passwords. Although passwords are encrypted with MD5 encryption algorithm, hacker can break it by brute forcing if password is not so strong.
This hacker also shared some accounts data publically.
On the darkweb marketplace a vendor called " Peace_of_mind " put on this sell request.
ALERT !!! Please, Change Immediately your password on Yahoo mail, Flickr & Tumblr !!!
Source of the news : https://www.hackread.com/yahoo-to-announce-200-million-users-were-hacked/