Event Rental Systems and Fullsteam Software Holdings, LLC Data Breach — Class Action Review

Event Rental Systems operates as a specialized software and technology provider tailored to the party, event, and equipment rental industry, working in conjunction with its parent organization, Fullsteam Software Holdings, LLC. The company provides critical enterprise resource planning (ERP) platforms, online booking engines, customer relationship management tools, and payment processing integrations utilized by businesses ranging from small local tent rentals to large-scale municipal event suppliers. Because these platforms serve as the central operational hub for rental businesses, they collect, process, and store an immense volume of deeply sensitive information. This repository typically includes not only the internal corporate records and employee data of the rental operators themselves, but also the extensive personal details, home addresses, contact information, and payment card details of thousands of consumers who book events, weddings, and equipment through these software-driven portals.

The 2025 security incident reported to the New Hampshire Attorney General involving Event Rental Systems and Fullsteam Software Holdings, LLC underscores the critical vulnerabilities inherent in vertically integrated software-as-a-service (SaaS) platforms and third-party vendor ecosystems. While investigations into incidents of this scale often point toward unauthorized intrusions, credential compromises, or systemic exploits within database architectures, the fundamental reality is that centralized cloud software environments represent high-value targets for malicious actors. When a software provider servicing thousands of distinct commercial clients suffers a security breach, the blast radius is exponentially magnified, potentially compromising downstream customer data across multiple independent businesses through a single point of failure.

The data compromised in incidents involving specialized commercial and consumer-facing software platforms frequently encompasses a dangerous mix of personally identifiable information and transactional records. Exposed data types often include full names, billing and home addresses, email addresses, phone numbers, and sensitive financial transaction details such as credit card numbers, expiration dates, and security codes. The exposure of this information creates severe, immediate risks for affected consumers and business operators alike. Unlike transient data, persistent identifiers like names and contact information combined with detailed purchase and billing histories provide cybercriminals with the precise ingredients necessary to execute sophisticated phishing attacks, credential stuffing campaigns, and unauthorized financial account takeovers.

Under state consumer protection statutes, including the New Hampshire Regulation of Business Practices and Consumer Protection Act, as well as general common-law negligence principles, companies that collect and store sensitive personal data have an affirmative legal obligation to implement and maintain reasonable security measures. This includes robust encryption protocols, multi-factor authentication, regular vulnerability patching, and strict access controls. The occurrence of a significant data breach strongly suggests a failure in these fundamental duties of care, indicating that the defendants may have neglected to deploy industry-standard safeguards necessary to protect the private information entrusted to their platforms.

Receiving a data action notification letter from Event Rental Systems and Fullsteam Software Holdings, LLC is a formal acknowledgment that your private information was compromised due to inadequate corporate security practices. Legally, the receipt of this notice establishes the concrete standing required to participate in a class action lawsuit aimed at holding the company accountable. You do not need to prove that you have already suffered actual financial loss or identity theft to seek legal redress; the increased risk of future harm and the loss of privacy are actionable injuries. Our firm is actively investigating this data breach on a contingency fee basis, meaning there are never any out-of-pocket costs or attorney fees unless we successfully recover compensation on your behalf.