• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
Tech

Facebook Turmoil Continues with Hack Affecting 50 Million Users

By
Jonathan Vanian
Jonathan Vanian
Down Arrow Button Icon
September 28, 2018, 3:11 PM ET

Facebook’s recent string of management disasters continued with the social networking giant reporting a major hack on Friday that affected up to 50 million people.

CEO Mark Zuckerberg said in a call with reporters the company “patched the issue last night and are taking precautionary measures” to avoid any further damage.

The hackers were able to steal from 50 million accounts, so-called access tokens used to keep people logged into Facebook so they don’t have to constantly re-enter their passwords, explained Facebook vice president of product management Guy Rosen. With the access tokens, hackers could take control of a person’s account, effectively allowing them to do things like read personal messages, post comments, and share information with other users.

The attack is different from Facebook’s Cambridge Analytica scandal, in which an academic researcher built an app that gleaned information from Facebook, and then gave the data to a political consulting firm, violating Facebook’s policies. Although Cambridge Analytica employees were alleged to have used Facebook user data to send people personalized messages to influence their political beliefs, the firm never actually controlled Facebook user accounts without their knowledge.

About Facebook’s latest data hack, Zuckerberg said, “The investigation is still very early,” and “We do not yet know if any of the accounts were actually misused.”

Rosen said that Facebook has notified the FBI and law enforcement of the hack, which he attributed to attackers who were able to exploit three separate software bugs within Facebook’s web infrastructure. Rosen said the hackers were likely sophisticated, considering they were able to discover the bugs, realize how they were connected to each other, and carry out the attacks.

Still, Rosen said “it is hard to determine who is behind this.”

“We may never know,” Rosen said.

The latest hack is another major misstep for Facebook, which has been trying to win back consumer trust after several recent debacles. Besides the Cambridge Analytica scandal, lawmakers have criticized Facebook for failing to prevent the spread of propaganda from Russian-linked entities before the 2016 U.S. Presidential election, and is facing legal problems related to alleged discrimination caused by its automated personalized ad-targeting services.

This week, tech news site Gizmodo and a team of academic researchers reported that when Facebook users give the company their phone number for security purposes, online advertisers are able to use that information to send personalized ads.

Additionally, several top executives have recently left the social networking giant as it attempts to weather its storm of recent controversies. They include Facebook’s security chief Alex Stamos, who departed in August to join Stanford University, and communications and policy head Elliot Schrage, who left in June.

Get Data Sheet, Fortune’s technology newsletter.

Earlier this week, the co-founders of Facebook-owned Instagram abruptly announced they were leaving, reportedly due to disagreements with Facebook’s management team taking more control of the popular photo-sharing app.

Meanwhile, WhatsApp co-founder and former Facebook employee Brian Action also expressed resentment with Facebook executives in an interview with Forbes published this week over the company’s increasing influence on the messaging app, which Facebook bought in 2014 for $19 billion. Facebook executive David Marcus responded to Action’s interview and called him “low class.”

About Facebook’s latest data blunder, U.S. Senator Mark Warner said that it “is another sobering indicator that Congress needs to step up and take action to protect the privacy and security of social media users.”

This news is deeply concerning. A full investigation should be swiftly conducted and made public so that we can understand more about what happened.

— Mark Warner (@MarkWarner) September 28, 2018

When asked by a reporter why Facebook users should continue to trust the company after so many missteps, Zuckerberg reiterated that the company takes security issues seriously, patched the latest vulnerability, and took additional precautionary measures.

“Security is an arms race,” Zuckerberg said.

Facebook shares fell nearly 3% in midday trading on Friday to $164.30.

About the Author
By Jonathan Vanian
LinkedIn iconTwitter icon

Jonathan Vanian is a former Fortune reporter. He covered business technology, cybersecurity, artificial intelligence, data privacy, and other topics.

See full bioRight Arrow Button Icon

Latest in Tech

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Fortune Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map

Latest in Tech

AIMark Cuban
Mark Cuban says AI allows ‘creators to become exponentially more creative,’ but his advice didn’t land well with people working in the industry
By Sydney LakeDecember 22, 2025
23 minutes ago
Larry Ellison sits in the Oval Office
Big TechLarry Ellison
Billionaire Larry Ellison comes to his son’s rescue, agreeing to personally guarantee over $40 billion to finance Paramount’s bid for Warner Bros.
By Dave SmithDecember 22, 2025
31 minutes ago
man
AIstatistics
It’s starting to look like we’ll never come up with a good way to tell what was written by AI and what was written by humans
By Ambuj Tewari and The ConversationDecember 22, 2025
2 hours ago
Chris Nicholas
CommentaryLeadership
I’m the Sam’s Club CEO and I’ve got an AI leadership reality check: let purpose, not promise, guide investment
By Chris NicholasDecember 22, 2025
2 hours ago
Geoff Green
Commentarymortgages
Your mortgage likely cost $11,500 to originate—and reams of paperwork. How Salesforce Agentforce is helping improve the process
By Geoff GreenDecember 22, 2025
3 hours ago
Woodside
AIBrainstorm AI
An Iowa company that builds wood chippers doesn’t care about your AI buzzwords: 2 Silicon Valley CEOs get real about the hype-slop-cycle
By Nick LichtenbergDecember 22, 2025
3 hours ago

Most Popular

placeholder alt text
Future of Work
Meet a 55-year-old automotive technician in Arkansas who didn’t care if his kids went to college: ‘There are options’
By Muskaan ArshadDecember 21, 2025
1 day ago
placeholder alt text
Success
Multimillionaire musician Will.i.am says work-life balance is for people 'working on someone else’s dream'—he grinds from 5-to-9 after his 9-to-5
By Orianna Rosa RoyleDecember 21, 2025
24 hours ago
placeholder alt text
Future of Work
A Walmart employee nearly doubled her pay after entering its pipeline for skilled tradespeople. 'I was able to move out of my parents' house'
By Anne D'Innocenzio and The Associated PressDecember 20, 2025
2 days ago
placeholder alt text
Economy
Even if the Supreme Court rules Trump's global tariffs are illegal, refunds are unlikely because that would be 'very complicated,' Hassett says
By Jason MaDecember 21, 2025
17 hours ago
placeholder alt text
Success
The scientist who helped create AI says it’s only ‘a matter of time’ before every single job is wiped out—even safer trade jobs like plumbing
By Orianna Rosa RoyleDecember 19, 2025
3 days ago
placeholder alt text
Future of Work
'They'll lose their humanity': Dartmouth professor says he's surprised just how scared his Gen Z students are of AI
By Nick LichtenbergDecember 20, 2025
2 days ago

© 2025 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.