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.
Source: https://www.claimdepot.com/data-breach/cliff-viessman-inc-2025
TPRM report: https://www.rankiteo.com/company/viessmantrucking
"id": "vie1102811091325",
"linkid": "viessmantrucking",
"type": "Breach",
"date": "8/2025",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'customers_affected': 3637,
'industry': 'Trucking/Transportation',
'name': 'Cliff Viessman, Inc. (Viessman Trucking)',
'type': 'Private Company'}],
'customer_advisories': ['Notification letters sent to affected individuals '
'(Sept. 10, 2025)',
'Dedicated assistance line: 1-833-426-7740 (Mon–Fri, '
'8 a.m.–8 p.m. ET)'],
'data_breach': {'data_exfiltration': True,
'number_of_records_exposed': 3637,
'personally_identifiable_information': ['names',
'Social Security '
'numbers',
"driver's license "
'numbers'],
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Personally Identifiable '
'Information (PII)']},
'date_detected': '2025-08-05',
'date_publicly_disclosed': '2025-09-10',
'description': 'On Aug. 5, 2025, Cliff Viessman, Inc. (Viessman Trucking) '
'detected suspicious activity within its internal network. An '
'investigation revealed unauthorized access to certain '
'systems, leading to the copying of files containing '
'personally identifiable information (PII) of 3,637 '
'individuals. Exposed data included names, Social Security '
"numbers, and driver's license numbers. The company notified "
'affected individuals on Sept. 10, 2025, and disclosed the '
'breach to the Vermont, Montana, and New Hampshire Attorney '
"Generals' offices between Sept. 10 and Sept. 11, 2025.",
'impact': {'data_compromised': ['names',
'Social Security numbers',
"driver's license numbers"],
'identity_theft_risk': 'High (PII exposed)'},
'investigation_status': 'Completed (as of public disclosure)',
'post_incident_analysis': {'corrective_actions': ['Securing systems',
'Implementing additional '
'technical safeguards',
'Enhanced security '
'measures']},
'recommendations': ['Sign up for the free credit monitoring services offered '
'by the company.',
'Monitor credit reports and financial accounts for '
'unusual activity.',
'Be alert for phishing emails or phone calls that may use '
'exposed information.',
'Consider placing a fraud alert or credit freeze with '
'major credit bureaus.'],
'references': [{'source': 'Viessman Trucking Breach Notice'},
{'source': 'Viessman Trucking Website'}],
'regulatory_compliance': {'regulatory_notifications': ['Vermont Attorney '
'General',
'Montana Attorney '
'General',
'New Hampshire '
'Attorney General']},
'response': {'communication_strategy': ['Notifying affected individuals '
'(Sept. 10, 2025)',
'Disclosing to Vermont, Montana, and '
"New Hampshire Attorney Generals' "
'offices (Sept. 10–11, 2025)',
'Offering 12 months of free '
'TransUnion Cyberscout credit '
'monitoring',
'Dedicated assistance line '
'(1-833-426-7740)'],
'containment_measures': ['Securing systems'],
'enhanced_monitoring': True,
'incident_response_plan_activated': True,
'remediation_measures': ['Implementing additional technical '
'safeguards',
'Enhanced security measures']},
'title': 'Data Breach at Cliff Viessman, Inc. (Viessman Trucking)',
'type': 'Data Breach'}