Company Data Breaches and Security Incidents

Search incidents by company, country, industry, year and attack method. Review affected data, impact, verification status, company responses and sources.

382 results
Confirmed

Kaplan North America: files with SSNs taken from servers

An unauthorised actor accessed Kaplan’s servers between October 30 and November 18, 2025 and took certain files; on February 21, 2026 Kaplan determined the files contained names, SSNs and/or driver’s licence numbers.

Investigating

Woundtech reports possible data copying

Possible data leak: Information may have been copied by an unauthorised individual in a December 2025 incident.

Confirmed

Jacobson Adler: files copied in network intrusion

An unauthorised actor accessed the network October 12–26, 2025 and copied files that may include names, SSNs and financial-account information.

Investigating

OSI Systems: files on network may have been accessed

After becoming aware of suspicious activity in its network, OSI found that certain files may have been accessed without authorisation; it completed its review of the affected files on February 10, 2026.

Investigating

Melvin Mora & Associates: tax client data may have been exposed

Possible data leak: In late February 2026, the firm’s 2025 client data environment was affected by a breach; the investigation identified 13 clients whose information was used to file fraudulent tax returns, which were blocked by the IRS and California Franchise Tax Board.