Looks like Yahoo! users can forget about the NSA for a little bit, and just worry about good ol' fashioned hackers for today.
The company announced in a blog post that hackers were able to steal the passwords of many of their Yahoo! Mail users. The company didn't announce how many people were affected by the hack, but they've reportedly began sending notifications to users who may have been targeted. Yahoo! Mail has about 270 million users, and is the second largest email service behind Gmail. The company says that the hackers were able to gather the information from a third party service, and not their servers. "The information sought in the attack seems to be names and email addresses from the affected accounts’ most recent sent emails," the company said. "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."
So, even if you haven't received a notifcation from Yahoo! to change your password, do it anyway. Especially if your recent emails have sensitive information, and even more so if you use that same Yahoo! password for other financial or important accounts.