Equifax Data Breach History

This page tracks the Equifax data breach history and cybersecurity incidents affecting Equifax (United States). BreachHistory currently indexes 8 publicly disclosed or catalogued incidents spanning 2006 through 2017, with approximately 470.8 million records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.

The Equifax breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed.

Largest Equifax Data Breaches

The largest indexed incidents include the 2017 — Equifax: Poor security / misconfiguration, 163,119,000 records, the 2017 major breach — Apache Struts, and the 2017 — Equifax: Equifax, which supplies credit information and…, along with additional historical incidents involving exposed passwords, public databases, and large-scale data scraping. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Equifax or a regulator. Below is the list of large data breaches:

• 2017 2017 — Equifax: Poor security / misconfiguration, 163,119,000 records — about 163.1M records exposed · Catalogued incident
• 2017 2017 major breach — Apache Struts — about 147.9M records exposed · Catalogued incident
• 2017 2017 — Equifax: Equifax, which supplies credit information and… — about 145.5M records exposed · Catalogued incident
• 2017 2017 Equifax UK — 13.8M records, 694K substantive — about 13.8M records exposed · Catalogued incident
• 2016 2016 — Equifax: Identity thieves stole tax and salary data from… — about 431.0K records exposed · Catalogued incident
• 2012 2012 — Equifax: Equifax settled charges with the Federal Trade… — about 17.0K records exposed · Catalogued incident
• 2006 2006 — Equifax: On May 29, a company laptop containing employee… — about 2.5K records exposed · Catalogued incident
• 2010 2010 — Equifax: An unknown number of current and former employees… — about 35 records exposed · Catalogued incident

What Information Was Exposed?

Depending on the incident, exposed data may include email addresses, Social Security numbers and national IDs, names, physical addresses, health and medical (PHI) records, dates of birth, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.

Equifax Data Breach 2026

At the time of this update, no Equifax data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.

What To Do If You Were Affected

If you believe your account may have been involved in a Equifax data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.

This Equifax breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.