Facebook — 509.5M accounts
Severity: Critical · Kind: Data breach
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From the source
In April 2021, a large data set of over 500 million Facebook users was made freely available for download . Encompassing approximately 20% of Facebook's subscribers, the data was allegedly obtained by exploiting a vulnerability Facebook advises they rectified in August 2019. The primary value of the data is the association of phone numbers to identities; whilst each record included phone, only 2.5 million contained an email address. Most records contained names and genders with many also including dates of birth, location, relationship status and employer.
Breach facts
- Accounts affected
- 509,458,528
- Verified
- Yes
- Sensitive
- No
- Domain
- facebook.com
- Data exposed
- Dates of birthEmail addressesEmployersGendersGeographic locationsNamesPhone numbersRelationship statuses
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Plain-English summaries are AI-generated and reviewed for tone, not technical accuracy. For incident response, always rely on the original source linked above.