Breach Intelligence

6,875

Total breached databases

Experian 2015

Experian 2015

In September 2015, the US based credit bureau and consumer data broker Experian suffered a data breach that impacted 15 million customers who had applied for financing from T-Mobile. An alleged data breach was subsequently circulated containing personal information including names, physical and email addresses, birth dates and various other personal attributes.
  • Data: Birthdates Credit Card Information Email Addresses Ethnicities Family Members Financial Information Genders IP Addresses Names Order Information Phone Numbers Physical Locations Real Estate Information
  • Records: 27,835,330
  • Lines: 27,835,340
  • Size: 5.25 GB
  • Passwords: No

Not Acxiom 2020

In 2020, a dataset containing nearly a quarter of a billion records across more than 400 fields was reportedly circulated within the hacking community and misattributed to database marketing company Acxiom. The corpus of data allegedly included almost 52 million unique email addresses.
  • Data: Email Addresses IP Addresses Names Phone Numbers Physical Locations
  • Records: 250,807,711
  • Lines: 250,808,966
  • Size: 229.29 GB
  • Passwords: No
Hhs.gov 2021

Hhs.gov 2021

In January 2021, the U.S. Department of Health and Human Services (HHS) reportedly experienced a major data breach that exposed the personal information of approximately 6,507,793 individuals. The incident was attributed to a flaw in the agency’s data handling system, which allowed unauthorized access to a large database. Among the compromised data were names, phone numbers, physical locations, genders, job information, and company details. No passwords were included. The dataset later resurfaced on online forums in 2023, raising concerns about identity theft, fraud, and the adequacy of HHS's data security practices.
  • Date: Jan 24, 2021
  • Domain: hhs.gov
  • Country: United States
  • Category: Healthcare
  • Data: Company Information Genders Job Information Names Phone Numbers Physical Locations
  • Records: 6,507,791
  • Lines: 6,507,792
  • Size: 1.44 GB
  • Passwords: No
Lime Leads 2020

Lime Leads 2020

In 2020, the US data broker LimeLeads suffered a data breach. LimeLeads is known for providing business sales leads and contacts. The breach exposed approximately 49 million records. Among the compromised data were email addresses, phone numbers, job information, and company names.
  • Data: Email Addresses Names Phone Numbers Physical Locations Job Information Company Information
  • Records: 39,825,642
  • Lines: 39,825,642
  • Size: 39.4 GB
  • Passwords: No
T-Mobile 2018

T-Mobile 2018

On August 20, T-Mobile, a major mobile phone provider, experienced a data breach that exposed the personal information of approximately 2 million customers, accounting for around 3% of its 77 million user base. Among the compromised data were names, phone numbers, genders, geographic locations, physical addresses, and ethnicities.
  • Date: 2018
  • Domain: t-mobile.com
  • Country: United States
  • Category: Telecommunications
  • Data: Names Phone Numbers Genders Geographic Locations Physical Locations Ethnicities
  • Records: 2,060,368
  • Lines: 2,060,410
  • Size: 266.36 MB
  • Passwords: No

Frequently Asked Questions

A data breach is unauthorized access to data (often involving account takeover, malware, or misconfigured infrastructure). A data leak is exposure of data due to mistakes like public cloud storage, open databases, or accidental publishing. A database dump is a packaged dataset that may come from a breach, leak, scraping, or aggregation.

Change passwords for any affected accounts immediately, prioritizing email, banking, and any account that shares the same password. Enable multi-factor authentication wherever possible. Monitor your accounts for suspicious activity and consider placing a fraud alert or credit freeze if financial data was exposed.

Start with containment and verification: confirm what data was exposed, identify the entry point, rotate credentials (especially SSO, VPN, email), and enforce MFA. Then investigate affected systems, notify stakeholders as required, and harden controls to prevent recurrence. A structured incident response plan helps keep the work measurable and compliant.

Dark web monitoring helps you spot exposure signals early — before stolen data is widely reused for account takeover or targeted attacks. Monitoring complements vulnerability management by revealing when attackers already have leverage. Pair it with continuous attack surface monitoring and strong Asset Discovery to reduce blind spots.

Not always. Some datasets are old, incomplete, or derived from third parties. However, any exposure increases risk because credentials and personal data can be reused indefinitely. Treat it as a priority signal: rotate credentials, enforce MFA, review suspicious logins, and audit the systems that could have produced the data.

SynScan helps you connect the dots between attack surface exposure, vulnerabilities, and breach signals so you can prioritize remediation and reduce the chance of repeat incidents.