HarbisonWalker International Data Breach Exposes SSNs

Attorneys working with ClassAction.org are looking into whether a class action lawsuit can be filed in light of the HarbisonWalker International data breach.

As part of their investigation, they need to hear from individuals who had their information exposed in the incident , including those who received notice of the HarbisonWalker International data breach or otherwise believe they are affected.

HarbisonWalker International Security Incident: What Happened?

HarbisonWalker International, a Pennsylvania-based supplier of refractory products and services, has reported a data breach that may have affected sensitive information.

A sample notification letter sent to potentially affected individuals, seen below, describes a cybersecurity incident involving its internal network that potentially impacted some personal information. According to a September 22, 2026 report filed with the Massachusetts Office of Consumer Affairs and Business Regulation , this included Social Security numbers and financial accounts.

The HarbisonWalker International data breach was also reported to the Vermont Attorney General's Office on September 22.

What You Can Do After the HarbisonWalker International Data Breach

If your information was exposed in the HarbisonWalker International data breach, attorneys want to hear from you. You may be able to start a class action lawsuit to recover compensation for loss of privacy, lost time, out-of-pocket costs, and more.

A successful case could also force HarbisonWalker International to ensure they take proper steps to protect the information they were entrusted with.

Affected by the HarbisonWalker International data breach? Fill out the form on this page today.

HarbisonWalker International Data Breach Notice

If you believe your information was exposed in the HarbisonWalker International data breach, fill out the form on this page to get in touch with us.

An attorney or legal representative may then reach out to you to explain more this investigation and ask you a few questions.

Remember, there is no cost to get in touch, and you are under no obligation to take action after speaking to someone.

Published: September 23, 2026

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The information submitted on this page will be forwarded to Bryson Harris Suciu & DeMay PLLC who has this investigation.

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ClassAction.org is a group of online professionals who are committed to exposing corporate wrongdoing and giving consumers the tools they need to fight back.

We've been reporting on the legal space for nearly a decade and have built relationships with class action and mass tort attorneys across the country.