Yahoo Discloses Second Major Hack, More Than 1 Billion Accounts Compromised

Yahoo today announced that it believes more than one billion Yahoo user accounts were compromised in a hack by an unauthorized third party in August of 2013.

Information stolen from affected accounts includes names, email addresses, telephone numbers, birth dates, hashed passwords, and both encrypted and unencrypted security questions and answers. Clear text passwords, bank account information, and credit/debit card information were not believed to be accessed in the attack.

yahoo
According to Yahoo, the hack was discovered after law enforcement officials provided the company with what appeared to be Yahoo user data from an unknown source. Yahoo says it has not been able to identify the specific intrusion, but it is "likely" distinct from a late 2014 hack that compromised more than 500 million Yahoo user accounts.

Earlier this year, Yahoo confirmed that "at least" 500 million user accounts were accessed in September of 2014, and this marks a second attack during the same general timeframe.

Yahoo is notifying users who may have been affected by the attack, and says it has "taken steps" to secure their accounts by implementing mandatory password changes. Unencrypted security questions and answers have also been invalidated.

Along with the 2013 hack compromising 1 billion user accounts, Yahoo has also announced that an ongoing outside investigation suggests an unauthorized third party accessed proprietary code to forge cookies, a technique that may have been used by the hackers responsible for the September 2014 attack. Those account holders are also being notified.

The outside forensic experts have identified user accounts for which they believe forged cookies were taken or used. Yahoo is notifying the affected account holders, and has invalidated the forged cookies. The company has connected some of this activity to the same state-sponsored actor believed to be responsible for the data theft the company disclosed on September 22, 2016.

Yahoo suggests users "review all of their online accounts" to check for suspicious activity and change any passwords that might have been used for a Yahoo account and another online account. Yahoo also recommends implementing two-factor authentication and avoiding links from suspicious emails.

Tag: Yahoo

Top Rated Comments

keysofanxiety Avatar
74 months ago
Wow, Yahoo really does suck.
Score: 18 Votes (Like | Disagree)
Schwyz Avatar
74 months ago
Yahoo has 1 billion+ accounts?
Wait, what company are we talking about again?
Score: 16 Votes (Like | Disagree)
avanpelt Avatar
74 months ago
I wonder if Verizon has the ability to walk away from the merger without significant financial consequence at this point? This is akin to finding out that the person you're engaged to has been living a secret life as a prostitute for the past 10 years.
Score: 14 Votes (Like | Disagree)
ziggie216 Avatar
74 months ago
Being hacked is one thing, how they manage to sweep it under is another thing.
Score: 12 Votes (Like | Disagree)
oplix Avatar
74 months ago
CNN breaking news: it was the russians (confirmed by 34 intelligence agencies)
Score: 8 Votes (Like | Disagree)
yaxomoxay Avatar
74 months ago
Glory days!

I remember the battles trying to get my sites listed in yahoo. It was where you needed to be. The amount of traffic you'd start getting once listed in the yahoo index proper was such a thrill.
You could also get some attention via very modern methods:

Score: 7 Votes (Like | Disagree)

Popular Stories

iPhone 14 Pro Lineup Feature Purple

Apple Planning to Hold iPhone 14 Event on September 7

Wednesday August 17, 2022 9:51 am PDT by
Apple is aiming to hold its first fall event on Wednesday, September 7, reports Bloomberg's Mark Gurman. The event will focus on the iPhone 14 models and the Apple Watch Series 8. The standard iPhone 14 models are expected to get few changes, but the iPhone 14 Pro models will include updated camera technology, the removal of the notch in favor of a pill-shaped and hole-punch cutout, an A16...
iOS 15

Apple Releases iOS 15.6.1 and iPadOS 15.6.1 With Bug Fixes

Wednesday August 17, 2022 9:50 am PDT by
Apple today released iOS and iPadOS 15.6.1, minor updates to the iOS and iPadOS 15 operating systems initially released in September 2021. iOS 15.6.1 and iPadOS 15.6.1 come a month after Apple released iOS 15.6 and iPadOS 15.6 with new Live Sports features and bug fixes. The iOS 15.6.1 and iPadOS 15.6.1 updates can be downloaded for free and the software is available on all eligible devices...
10th Generation iPad Render

10th-Generation iPad With Major Design Changes Reportedly in Production Ahead of September Launch

Monday August 15, 2022 8:02 pm PDT by
Apple's rumored 10th-generation iPad is currently in production and will feature "major" design changes, according to a report from Taiwanese website DigiTimes. A mockup of the potential 10th-generation iPad design by Renders By Shailesh The report did not provide any specific details about the 10th-generation iPad's new design, but rumors suggest the device will feature a larger 10.5-inch...
airpods pro black background

AirPods Pro 2: Five New Features and Improvements to Expect

Sunday August 14, 2022 3:28 pm PDT by
Apple's second-generation AirPods Pro are finally nearing launch, with a release expected later this year. If you are considering upgrading to the new AirPods Pro once they are released, keep reading for a list of five new features to expect. In addition to all-new features, the second-generation AirPods Pro will likely adopt some features added to the standard AirPods last year. H2 Chip ...
Apple Watch Series 3 v 8 1

Apple Watch Series 3 vs. Apple Watch Series 8: 20 Major New Features and Changes for Customers Upgrading

Tuesday August 16, 2022 6:52 am PDT by
It's crazy to think about, but next month will mark five years since Apple announced the Apple Watch Series 3. Despite being a severely antiquated smartwatch, the Series 3 has remained at the bottom of Apple's lineup for $199. Suppose you're still holding on to your Apple Watch Series 3. In that case, this article will list all the major new features and changes you'll get if you decide to...
ios 16 lock screen feature2

Apple Seeds Sixth Betas of iOS 16 and iPadOS 16 to Developers [Update: Public Beta Available]

Monday August 15, 2022 10:04 am PDT by
Apple today seeded the sixth betas of upcoming iOS 16 and iPadOS 16 updates to developers for testing purposes, with the updates coming a week after Apple released the fifth developer betas. Registered developers can download the iOS and iPadOS 16 profiles from the Apple Developer Center, and once installed, the betas will be available over the air. iOS 16 introduces a revamped Lock...