Yahoo Acknowledges Hacking Attempt, Resets Passwords for Affected Accounts.
From Yahoo Tumblr blog:
Security attacks are unfortunately becoming a more regular occurrence. Recently, we identified a coordinated effort to gain unauthorized access to Yahoo Mail accounts. Upon discovery, we took immediate action to protect our users, prompting them to reset passwords on impacted accounts.
Based on our current findings, the list of usernames and passwords that were used to execute the attack was likely collected from a third-party database compromise. We have no evidence that they were obtained directly from Yahoo’s systems. Our ongoing investigation shows that malicious computer software used the list of usernames and passwords to access Yahoo Mail accounts. The information sought in the attack seems to be names and email addresses from the affected accounts’ most recent sent emails.
Yahoo has initiated password rest to affected accounts.
Upon reading this announcement I changed the passwords to all my Yahoo account. Yes, I do have multiple Yahoo accounts.