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.
What we’re doing to protect our users
We are resetting passwords on impacted accounts and we are using second sign-in verification to allow users to re-secure their accounts. Impacted users will be prompted (if not, already) to change their password and may receive an email notification or an SMS text if they have added a mobile number to their account.
We are working with federal law enforcement to find and prosecute the perpetrators responsible for this attack.
We have implemented additional measures to block attacks against Yahoo’s systems.
What you can do to help keep your accounts secure
In addition to adopting better password practices by changing your password regularly and using different variations of symbols and characters, users should never use the same password on multiple sites or services. Using the same password on multiple sites or services makes users particularly vulnerable to these types of attacks.
We regret this has happened and want to assure our users that we take the security of their data very seriously.
For more information, please check our Customer Care help page.
By Jay Rossiter, SVP, Platforms and Personalization Products
4 out of a dozen or so from my friends' yahoo emails receive hacking attempts warning, all 4 were stopped; apparently hacked from Russia IP or somewhere near there, could be proxy. 1 got through and start sending spam to all contacts within.
I don't know why anyone still uses it, and the yahoo still offers it. They've had these issues for almost 7 years. Just change the date on this release to 2006, 2007, 2008, and so on, and that's yahoo.
Only mail service I know of that even with their "strongest" spam filters, 400 junk messages will still lands in the inbox.
I've had my account since 1997, when Yahoo first offered free email. I was tired or having to change email every time we changed ISPs. And back then, you changed often, or companies kept buying each other out and forcing mail domain changes.
So I don't want to change. Everybody knows that's my email.