Report by Identity Theft Resource Center
2025 H1 Data Breach Report
Key Findings
69% of 2025's breach notices did not include an attack vector. This is an increase from 65% for the full year 2024.
About 0.5% of all security breaches in the first half of 2025 were supply‑chain incidents, but these incidents generated nearly half of all breach notifications, affecting almost 700 companies.
1,732 data compromises were reported in the first half of 2025. This is about 5% ahead of H1 2024 in terms of compromises. It is also more reported compromises than at the halfway point in 2023, which was the previous high-water mark for data compromises.
78% of compromises reported in the first half of 2025 were true data breaches. These accounted for 69% of the breach notices issued in the first half of 2025.
H1 2025 compromises resulted in a little more than 165.7 million breach notices.
The number of victim notices through June 2025 is only 12% of the total for 2024. This is because there haven't been the same level of mega-breaches affecting hundreds of millions of people as seen last year.