On August 5, 2025, Viessman Trucking detected unauthorized access to its internal systems after suspicious activity was identified. An investigation confirmed that an external actor had copied files containing personally identifiable information (PII) of 3,637 individuals, including names, Social Security numbers, and driver’s license numbers. The breach was formally acknowledged on August 12, 2025, with notifications sent to affected individuals starting September 10, 2025. Regulatory disclosures were made to the Attorney Generals of Vermont, Montana, and New Hampshire shortly after. In response, Viessman Trucking secured its systems, implemented enhanced security measures, and offered 12 months of free credit monitoring (TransUnion Cyberscout) to impacted parties. The breach exposed sensitive data, increasing risks of identity theft, phishing, and financial fraud for victims. Affected individuals were advised to monitor accounts, place fraud alerts, and utilize the provided support resources, including a dedicated assistance line. The incident highlights vulnerabilities in employee and customer data protection, with potential long-term reputational and financial consequences for the company.