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Confirmed

Fluke: third-party application vulnerability exploited to access network

On September 29, 2025, Fluke learned a criminal actor exploited a vulnerability in a third-party application to access a limited segment of its network between August 10 and October 7, 2025; affected data included SSNs, dates of birth and a disability self-identification indicator.

Last updated: 2026-11-09

Overview

The company said the vulnerability also affected other companies using the same software. No total is given. The first-disclosure date is the earliest public document confirmed (California AG posting); 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. Sample consumer notice filed with California AG (Fluke Corporation)California Department of Justice, Office of the Attorney General · 2026-11-09
  2. California AG data breach report: Fluke CorporationCalifornia Department of Justice, Office of the Attorney General · 2026-11-09

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