• 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
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
Fortune Secondary Logo
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
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • 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
  • Group Subscriptions
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Tech

Even Nvidia’s own research teams can’t get enough GPUs amid the race for AI computing power
NewslettersEye on AI
Even Nvidia’s own research teams can’t get enough GPUs amid the race for AI computing power
By Sharon GoldmanApril 9, 2026
9 hours ago
You’re looking at the AI revolution all wrong, top economist says: 40% unemployment and a 3-day work week are the same thing
AIdisruption
You’re looking at the AI revolution all wrong, top economist says: 40% unemployment and a 3-day work week are the same thing
By Nick LichtenbergApril 9, 2026
10 hours ago
Zoom CEO Eric Yuan
Successthe future of work
‘I hate working 5 days’: Zoom CEO says traditional work schedules are becoming obsolete—and predicts a 3-day workweek by 2031
By Preston ForeApril 9, 2026
11 hours ago
Nutella seen aboard the Orion spacecraft Integrity.
RetailFood and drink
Nutella jumps on the best product placement money can’t buy: A trip to the far side of the Moon
By Catherina GioinoApril 9, 2026
12 hours ago
kash
Cybersecuritycyber
Trump’s ‘cease-fire’ won’t stop Iranian hackers for long, cyber experts say
By David Klepper and The Associated PressApril 9, 2026
12 hours ago
lego
PoliticsIran
AI-savvy pro-Iran groups troll America with Lego Movie-style propaganda videos mocking American failure
By Sam McNeil and The Associated PressApril 9, 2026
13 hours ago

Most Popular

The U.S. government is spending $88 billion a month in interest on national debt—equal to spending on defense and education combined
Economy
The U.S. government is spending $88 billion a month in interest on national debt—equal to spending on defense and education combined
By Fortune EditorsApril 9, 2026
15 hours ago
2 years ago, Saudi Arabia quietly canceled the ‘petrodollar’ deal with America that wired the world economy for 50 years. Then war broke out in Iran
Energy
2 years ago, Saudi Arabia quietly canceled the ‘petrodollar’ deal with America that wired the world economy for 50 years. Then war broke out in Iran
By Fortune EditorsApril 7, 2026
2 days ago
Gen Z doesn't want your full-time job. They want several part-time roles, and it's reshaping the entire workforce
Success
Gen Z doesn't want your full-time job. They want several part-time roles, and it's reshaping the entire workforce
By Fortune EditorsApril 9, 2026
18 hours ago
Self-made billionaire MrBeast says his work-life balance is nonexistent and calls it a ‘miracle’ if he works less than 15-hour days: ‘I live to work’
Success
Self-made billionaire MrBeast says his work-life balance is nonexistent and calls it a ‘miracle’ if he works less than 15-hour days: ‘I live to work’
By Fortune EditorsApril 8, 2026
1 day ago
Gen Z workers are so fearful AI will take their job they’re intentionally sabotaging their company’s AI rollout
AI
Gen Z workers are so fearful AI will take their job they’re intentionally sabotaging their company’s AI rollout
By Fortune EditorsApril 8, 2026
1 day ago
The U.S. had a national debt ‘home run’ in its grasp, says Jamie Dimon. But the government did nothing, and now its best option is crisis management
Economy
The U.S. had a national debt ‘home run’ in its grasp, says Jamie Dimon. But the government did nothing, and now its best option is crisis management
By Fortune EditorsApril 8, 2026
2 days ago

© 2026 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.