Data breaches have become a defining risk of modern digital life. The Facebook breach is one of the most significant in recent memory — and if you've ever had an account with the affected service, your personal data may be circulating among cybercriminals right now.
This guide explains exactly what happened, what data was taken, and how you can check whether your information was exposed — for free, in 30 seconds.
What Happened?
The details of this breach are covered in the FAQ section below, where we answer the most important questions clearly and concisely. The key facts: who was affected, what data was taken, how attackers got in, and what the consequences have been.
Why Does This Still Matter?
Many people assume that because a breach happened years ago, the risk has passed. In reality, stolen data is sold, traded, and reused for years after a breach. Credentials from old breaches are used in credential stuffing attacks — automated attempts to log in to your other accounts using the same email and password combination.
If you reused the same password across multiple sites, one old breach can unlock dozens of your current accounts.
How to Check If You Were Affected
The fastest way is to use our free breach checker. Enter your email address and we'll scan it against known breach databases instantly — no signup required.
If your email appears in a breach, you'll see exactly which breaches affected it and what type of data was exposed. That tells you precisely where to start.
What to Do If You Were Affected
If your data was in this breach — or any breach — take these steps:
- Change the affected password immediately — especially if you reused it anywhere else.
- Enable two-factor authentication on every account that supports it, starting with email and banking.
- Check for suspicious activity on financial accounts if payment data was involved.
- Be alert for phishing — attackers use breach data to craft convincing personalised scam messages.
- Freeze your credit if your Social Security number, passport, or government ID was exposed.
Frequently Asked Questions
When did the Facebook data breach happen?
The data was scraped in 2019 by exploiting a phone number lookup feature that Facebook later disabled. The scraped dataset was briefly sold and shared in private communities, then published freely on a hacking forum in April 2021.
What data was in the Facebook leak?
533 million records from 106 countries were included. The data contained Facebook IDs, full names, phone numbers, locations, birthdates, email addresses (for some users), and other profile details.
This was scraping, not hacking — does that matter?
The legal distinction matters less for affected users. Your phone number and personal details are just as exposed whether they were obtained by hacking databases or by abusing a public-facing feature. The data is freely available and actively used for spam and fraud.
How do I check if my Facebook data was leaked?
Enter your phone number or email address in the free checker at Scan My Shadow. Troy Hunt at Have I Been Pwned added the Facebook dataset specifically by phone number.
What should I do if my Facebook phone number was exposed?
Be alert for SMS phishing (smishing) and calls from unknown numbers. Your phone number is linked to your Facebook identity, enabling more convincing impersonation attacks. Consider changing your Facebook contact number if possible.
Sources
- Have I Been Pwned – Facebook breach entry
- Alon Gal – Original public disclosure on Twitter
- Irish DPC – Facebook investigation