Data Breaches 2024-2025

Comprehensive database of major data breaches. Track incidents by industry, attack vector, and records affected. Updated weekly with verified sources.

Last updated: November 17, 2025

48
Total Breaches
4.3B
Records Affected
11
Healthcare Breaches
15
Ransomware Attacks

Key Insights from 2024-2025

Largest Breach: National Public Data with 2.9B records exposed
Most Common Vector: Ransomware (15 incidents) and Third-Party breaches dominate
Healthcare Most Targeted: 11 healthcare breaches averaging $10.93M in costs

Breach Database

Showing 48 breaches
Discovered:
3/8/2025
Records:
5.6M
Healthcare Unknown

Connecticut's largest healthcare provider suffered a network intrusion exposing patient names, SSNs, medical record numbers, and demographic information for over 5.5 million individuals.

Discovered:
2/10/2025
Records:
Unknown
Retail Third-Party

Hertz customer data including driver's licenses and SSNs were stolen via Cleo file transfer vulnerabilities exploited by Cl0p ransomware gang between October-December 2024.

Grubhub Investigating
Discovered:
2/4/2025
Records:
17.0M
Technology Third-Party

Grubhub data breach via compromised third-party vendor exposed customer, driver, and merchant contact information including hashed passwords and partial payment card data.

Discovered:
1/2/2025
Records:
1.1M
Healthcare Unknown

Connecticut healthcare provider breach exposed SSNs, COVID vaccination records, diagnoses, and treatment information for over 1 million patients.

PowerSchool Resolved
Discovered:
12/28/2024
Records:
62.4M
Education Exploitation

Massive K-12 education breach exposed personal data of 62.4 million students and educators including names, SSNs, medical information, and grades after compromised credentials accessed PowerSource portal.

Discovered:
12/8/2024
Records:
Unknown
Government Third-Party

Chinese state-sponsored APT group Silk Typhoon exploited BeyondTrust API vulnerability to access Treasury workstations and unclassified documents in major federal breach.

Blue Yonder Resolved
Discovered:
11/21/2024
Records:
Unknown
Technology Ransomware

Termite ransomware gang attacked supply chain management provider, disrupting operations at Starbucks, Sainsbury's, and Morrisons with 680GB of data exfiltrated.

Hot Topic Investigating
Discovered:
10/21/2024
Records:
57.0M
Retail Third-Party

Largest retail breach in history exposed 57 million customer records including partial credit card numbers and personal information via compromised Snowflake cloud account.

Casio Resolved
Discovered:
10/5/2024
Records:
9K
Technology Ransomware

Underground ransomware gang attacked Casio via phishing, exposing personal data of 8,500 employees, business partners, and customers including payroll information.

Globe Life Investigating
Discovered:
6/1/2024
Records:
850K
Financial Exploitation

Insurance giant Globe Life faced extortion attempts after hackers stole SSNs, health data, and policy information of 850,000 customers from subsidiary web portal.

MoneyGram Resolved
Discovered:
9/20/2024
Records:
Unknown
Financial Phishing

Social engineering attack on MoneyGram's help desk exposed customer SSNs, government IDs, bank account numbers, and transaction data during three-day attack.

MC2 Data Investigating
Discovered:
8/7/2024
Records:
106.0M
Other Misconfiguration

Background check company left 2.2TB database passwordless, exposing records of 106 million Americans including SSNs, employment history, and legal records.

Discovered:
4/8/2024
Records:
2.9B
Other Exploitation

One of largest breaches ever exposed 2.9 billion records including SSNs and personal data of up to 170 million people, leading company to file bankruptcy.

Discovered:
7/18/2024
Records:
500K
Government Ransomware

Rhysida ransomware gang stole 6.5TB of city data including SSNs and bank accounts of 500,000 residents after demanding $1.9 million ransom.

Discovered:
3/25/2024
Records:
4.3M
Healthcare Third-Party

Third-party vendor breach exposed health savings account holder data including SSNs, diagnoses, prescriptions, and partial payment card information for 4.3 million people.

Rite Aid Resolved
Discovered:
6/6/2024
Records:
2.2M
Retail Ransomware

RansomHub ransomware attack via impersonated employee credentials exposed driver's license numbers and personal data of 2.2 million pharmacy customers.

Discovered:
1/16/2024
Records:
15.0M
Technology Misconfiguration

Unsecured REST API allowed threat actor to scrape 15 million user email addresses and profile information by querying with known email addresses.

AT&T Resolved
Discovered:
4/19/2024
Records:
110.0M
Technology Third-Party

AT&T breach via compromised Snowflake account exposed call and text records of nearly all 110 million cellular customers dating back to mid-2022.

Discovered:
5/29/2024
Records:
7.6M
Financial Ransomware

LockBit ransomware attack via malicious link click exposed SSNs and bank account numbers of 7.6 million people including fintech partner customers like Wise and Affirm.

Synnovis Resolved
Discovered:
6/3/2024
Records:
Unknown
Healthcare Ransomware

Qilin ransomware attack on NHS pathology services caused blood shortage crisis in London hospitals, forcing cancellation of 800+ surgeries with £32.7M in damages.

2024-2025 Breach Analysis

Major Trends

The 2024-2025 breach landscape is dominated by three critical patterns: supply chain attacks, ransomware escalation, and healthcare targeting.

1. Supply Chain Vulnerabilities

The Snowflake breach campaign affected 165+ organizations including Ticketmaster (560M records), AT&T (110M records), and Santander (30M records). Third-party risk management failures enabled cascading breaches across industries.

2. Ransomware Evolution

Ransomware groups like ALPHV/BlackCat, RansomHub, and LockBit executed sophisticated attacks. The Change Healthcare breach ($2.87B cost) demonstrated how ransomware can cripple critical infrastructure. Key tactic: double extortion (encrypt + steal data).

3. Healthcare Under Siege

Healthcare breaches averaged $10.93M in costs—highest of any industry. Notable incidents: Change Healthcare (192.7M records), Ascension Health (5.6M records), Yale New Haven Health (5.5M records). HIPAA violations compound financial damage with regulatory penalties.

Attack Vector Distribution

  • Ransomware: 15 incidents (31%)
  • Third-Party/Supply Chain: 14 incidents
  • Exploitation: 9 incidents
  • Misconfiguration: 3 incidents

Lessons for Organizations

  1. Third-party risk is your risk: Audit vendor security controls. The weakest link in your supply chain becomes your breach.
  2. Detection speed matters: Average detection time is 277 days. Organizations that contain breaches under 200 days save 54% on costs.
  3. Ransomware requires preparation: Have offline backups, incident response plans, and never pay without expert consultation.
  4. Healthcare needs specialized security: PHI exposure carries maximum regulatory and reputational damage.
  5. Basic security hygiene fails: Many breaches exploit unpatched systems, weak credentials, and misconfigured cloud services.

Don't Become a Statistic

The average breach costs $4.45M and takes 277 days to detect. Prepare your incident response plan now—before you need it.

Data Sources

Breach information compiled from: HIPAA Journal, BleepingComputer, TechCrunch, SecurityWeek, state Attorney General breach notifications, company disclosures, and HaveIBeenPwned. All data verified against multiple sources where possible. Records affected are based on official disclosures or credible estimates.