Mass hack attack on Yahoo Mail accounts prompts password reset

Attackers target people who use the same password to secure multiple accounts.

Yahoo Detects Mass Hack Attempt On Yahoo Mail, Resets All Affected Passwords

Four Men Charged With Hacking 500M Yahoo Accounts – Krebs on Security

Sky customers told to change passwords after massive Yahoo hack • Graham Cluley

I lost the password to my Yahoo mail. I also can't get into the recovery phone number or email. What should I do? - Quora

Yahoo says half a billion accounts breached by nation-sponsored hackers

SANS Institute, Following a Trail of Breadcrumbs - A Design Flaw in Yahoo! Mail

Your Account Was Hacked Email Scam - Removal and recovery steps (updated)

Yahoo Security Alert: Resetting Password Isn't Enough

The Value of a Hacked Email Account – Krebs on Security

What To Do With Your Hacked Yahoo Account

Yahoo hacked - signs your account has been stolen and what to do