HarbisonWalker International Data Breach

HarbisonWalker International (HWI), a Pittsburgh-based supplier of refractory products and services, has notified individuals of a cybersecurity incident involving its internal network that may have affected some of their personal information. Manufacturing and industrial companies that maintain employee and business records have a responsibility to secure that data, and a network intrusion can leave affected individuals exposed to identity theft risk even when no misuse has yet been confirmed.

HarbisonWalker International’s Data Breach Investigation

In its notification letter, HarbisonWalker International stated that it identified suspicious activity affecting its internal network and, upon discovering the activity, took steps to secure its network, assess the security of its systems, and investigate what had occurred. The company reported the incident to appropriate government authorities and federal law enforcement agencies, and is notifying potentially impacted individuals while providing resources to help protect their information.

HWI stated that it currently has no indication that any of the potentially affected data has been fraudulently misused, and that it is notifying individuals in line with its commitment to transparency rather than because of confirmed fraud. As part of its response, the company said it continues to review and enhance its security measures, policies, and procedures where appropriate, and is offering affected individuals 24 months of complimentary credit monitoring and identity theft protection services through Experian.

Manufacturing companies like HWI are increasingly targeted by cybercriminals seeking access to employee records, vendor data, and other business information stored on internal networks. Network intrusions of this kind often originate through phishing, compromised credentials, or vulnerabilities in internet-facing systems, and can go undetected for a period of time before an organization’s security team identifies the suspicious activity.

HarbisonWalker International has not publicly disclosed the specific categories of personal information involved, the date the incident occurred, or how many individuals were affected. Affected individuals should refer to their notification letter for details specific to their own record.

When Did This Breach Occur?

HarbisonWalker International has not publicly disclosed the specific date the cybersecurity incident occurred. The company’s notification letters were dated September 22, 2026.

What Information Was Breached?

HarbisonWalker International has not publicly specified which categories of personal information were involved in this incident. Affected individuals should review their individual notification letter for details specific to their record.

What You Can Do

If you received a notification letter from HarbisonWalker International, consider taking the following steps:

• Enroll in the complimentary Experian IdentityWorks credit monitoring offered in your letter before the enrollment deadline.
• Place a fraud alert or credit freeze with Equifax, Experian, and TransUnion.
• Review your credit reports and financial statements for unfamiliar activity.
• Watch for phishing attempts referencing this incident.
• Report any suspicious account activity to your financial institution.

File a Data Breach Lawsuit Against HarbisonWalker International

If you were notified that your personal information may have been exposed in the HarbisonWalker International data breach, you may have legal options available to you.

Contact us at Class Action U, where we’ll connect you with a lawyer skilled in class action lawsuits. If you’ve been contacted about this breach, received notice, or discovered you were impacted, fill out our quick, easy, and secure form to sign up. There is no cost to reach out to our legal partner and no obligation after speaking with someone from our team.