Harnish Group Data Breach

Harnish Group Inc. has confirmed a cybersecurity breach that led to the exposure of employee names and Social Security numbers. The leaked data was publicly posted online by the attackers.

Harnish Group Inc.’s Data Breach Investigation

Harnish Group Inc., a company with a workforce of current and former employees across various departments, experienced a serious cybersecurity incident in late 2025. On November 11, 2025, the company became aware that a cyberattack had resulted in the unauthorized disclosure of personally identifiable information (PII). The breach was later confirmed to have occurred on November 7, 2025, and was discovered in full when the stolen data was publicly leaked online by the attackers on December 9, 2025.

Immediately after detecting the incident, Harnish Group retained external cybersecurity experts to conduct a thorough forensic investigation. These consultants identified how the attackers accessed the company’s systems and what vulnerabilities were exploited. The report concluded that attackers used compromised credentials to infiltrate the company’s network, later exfiltrating sensitive data files that included employee names and Social Security numbers.

Upon discovering that the breached information had been made public, Harnish Group reviewed the leaked files to identify affected individuals. A total of 2,888 individuals were impacted, including one Maine resident. The sensitive nature of the exposed information, especially Social Security numbers—elevates the risk of identity theft and long-term financial harm for those affected.

To mitigate the damage, Harnish Group partnered with Norton LifeLock to offer a complimentary two-year identity theft protection subscription. While the company claims to have implemented enhanced cybersecurity measures to prevent similar breaches in the future, the leak of unencrypted personal data is a serious issue.

Affected individuals are urged to enroll in the protection services offered or take independent steps to secure their financial and personal accounts. Legal action may be warranted for those whose private data was carelessly exposed and publicly released.

When Did This Breach Occur?

• Date of Breach: November 7, 2025

• Date Discovered by Company: November 11, 2025

• Public Leak of Data Identified: December 9, 2025

What Information Was Breached?

• First and last names

• Social Security numbers

This data was confirmed to have been publicly posted by the attackers.

What You Can Do

If you received a notification from Harnish Group, consider taking the following protective actions:

• Enroll in Identity Theft Protection: Use the free two-year Norton LifeLock subscription offered by Harnish Group. It provides monitoring and recovery services to help detect and respond to identity theft.

• Place a Fraud Alert or Credit Freeze: Contact one of the major credit bureaus—Experian, Equifax, or TransUnion—to place a fraud alert or freeze on your credit report.

• Monitor Financial Activity: Review your bank and credit card statements closely. Report unauthorized charges or new accounts immediately.

• Request Your Credit Reports: You’re entitled to one free credit report per year from each credit bureau. Check for suspicious activity or unfamiliar accounts.

• Report Identity Theft: If you suspect fraud, contact the FTC at IdentityTheft.gov and your local law enforcement.

At Class Action U, we guide individuals affected by data breaches in understanding their rights. Legal remedies may be available—don’t stand alone in this fight.

File a Data Breach Lawsuit Against Harnish Group Inc.

If your personal information was exposed in the Harnish Group breach, you may be eligible to join a class action lawsuit. Cybersecurity breaches that lead to the public release of sensitive information—especially Social Security numbers—often result in long-term consequences for those affected.

A lawsuit can help hold companies accountable for failing to secure your data and offer compensation for risks, stress, and potential financial losses. Whether you’ve already experienced identity theft or simply want to protect your future, seeking legal advice is a smart step.

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.