Hiller Companies Data Breach Exposes Social Security Numbers

On June 13, 2025, The Hiller Companies, a provider of fire protection products and services, discovered a data security incident that impacted the personal information of individuals connected to its operations. According to disclosures made to the California, Massachusetts, New Hampshire, Montana and Vermont Attorneys General, attackers copied certain files from Hiller’s systems without authorization on or around Dec. 18, 2024.

A detailed forensic investigation led by external cybersecurity experts revealed that the compromised files contained an array of sensitive information. The types of consumer information exposed include personally identifiable information (PII) such as names, Social Security numbers, driver’s license numbers, unique government-issued identification numbers, passport numbers, financial account information, and payment card numbers. In addition, protected health information (PHI) was also affected, including medical information and health insurance details.

The total number of affected individuals has not been released, but could include several thousand. Impacted residents include 123 in Massachusetts, 65 in New Hampshire and 12 in Montana.

Hiller Companies's response

For those affected, Hiller Companies is offering complimentary identity protection services through Cyberscout, a TransUnion company specializing in fraud assistance and remediation. Impacted individuals are eligible for up to 24 months of single-bureau credit monitoring, credit reports, credit scores, and proactive fraud assistance. These services provide alerts when changes occur to a credit file, helping individuals respond quickly to potential misuse of their information.

Given the nature of the breach, those who receive a notification are encouraged to:

• Enroll in the complimentary identity protection services using the instructions and code provided in their notification letter
• Obtain a free copy of their credit report from each of the three major credit bureaus at www.annualcreditreport.com
• Consider placing a security freeze or fraud alert on their credit file to prevent unauthorized credit activity
• Monitor account statements and credit reports closely for any signs of suspicious or unauthorized activity
• Report any suspected identity theft or fraud to law enforcement, their state attorney general, or the Federal Trade Commission

Affected individuals can contact the dedicated assistance line at 833-426-8016, Monday through Friday, 7 a.m. to 7 p.m. Central, for questions or support.