Facebook has no intention to notify the more than 530 million users whose details were hacked and posted online, the social media giant has said.
Facebook said in a blog post on Tuesday that ‘malicious actors’ had obtained the data prior to September 2019 by ‘scraping’ profiles using a vulnerability in the platform’s tool for synching contacts.
Among the victims were CEO Mark Zuckerberg, whose cell phone number was among the leaked personal data posted online by hackers.
A Facebook spokesman told Reuters the social media company was not confident it knew which users had been hacked and would need to be notified.
The spokesman said it also took into account that users could not fix the issue and that the data was publicly available in deciding not to notify users. Facebook has said it plugged the hole after identifying the problem at the time.
The scraped information did not include financial information, health information or passwords, Facebook said.
However, the collated data could provide valuable information for hacks or other abuses.

Computer servers that store users’ photos and other data are seen at the Facebook site in Prineville Oregon in a file photo. The social media giant is not planning to inform the more than 500 million users whose details were hacked

Phone numbers linked to more than 400 million Facebook accounts were posted online by hackers

Facebook CEO Mark Zuckerberg’s cell phone number is among the leaked personal data from 553 million users of the site posted online by hackers


Facebook co-founders Dustin Moskovitz, left, and Chris Hughes (right) also had similar personal details included in the leaked data
Last week, Facebook’s co-founder and president Zuckerberg was among the more than half billion to have had their data published on a hacker forum.
The the trove of stolen personal data included his location and marriage information, date of birth and Facebook user ID.
Facebook, which has long been under scrutiny over how it handles user privacy, in 2019 reached a landmark settlement with the U.S. Federal Trade Commission over its investigation into allegations the company misused user data.
Ireland’s Data Protection Commission, the European Union’s lead regulator for Facebook, said on Tuesday it had contacted the company about the data leak. It said it received ‘no proactive communication from Facebook’ but was now in contact.
The July 2019 FTC settlement requires Facebook to report details about unauthorized access to data on 500 or more users within 30 days of confirming an incident.
The Facebook spokesman declined to comment on the company’s conversations with regulators but said it was in contact to answer their questions.