Hacker known as Peace listed supposed credentials of Yahoo users on The Real Deal marketplace. Yahoo has not confirmed nor denied the legitimacy of the data. The company has said it is aware of the hackers claims, but hasnt confirmed or denied any of the credentials are legitimate. Yahoo account will be a lot safer if you have enabled two-step verification and have learnt to never reuse passwords. If you’re not being sensible about your online security, take appropriate steps now to harden your Yahoo account.”]
Source: https://grahamcluley.com/200-million-yahoo-passwords-sold-dark-web/