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.

Last updated: 2026-11-09

Overview

The CA filing lists December 23, 2025; the Washington AG filing lists December 23–25, 2025 and names, SSNs and dates of birth. No earlier 8-K or other public statement was found. Fields are templated; no total is given. The first-disclosure date is the earliest public document confirmed (Vermont AG posting on March 10, 2026); no 2025 public disclosure was found in other state AG lists, HHS or company notices checked.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Verify notices through official channels, avoid links in unexpected messages, do not provide credentials, and review credit reports and statements.

Sources

  1. Vermont AG: OSI Systems notice to consumers (2026-03-10)Vermont Office of the Attorney General · 2026-11-09
  2. Sample consumer notice filed with California AG (OSI Systems, Inc.)California Department of Justice, Office of the Attorney General · 2026-11-09
  3. Washington AG: OSI Systems, Inc. noticeWashington State Office of the Attorney General · 2026-11-09
  4. California AG data breach report: OSI Systems, Inc.California Department of Justice, Office of the Attorney General · 2026-11-09

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