Posillico Reports Data Breach Impacting Sensitive Personal Information
On December 8, 2025, construction and infrastructure firm Posillico detected a network disruption, prompting an investigation into a potential data breach. The company later confirmed that an unauthorized third party may have accessed or acquired sensitive personal identifiable information (PII) stored in its systems.
The exposed data varies by individual but includes names and Social Security numbers. Following a review to identify affected parties, Posillico began mailing breach notification letters on January 12, 2026, to impacted individuals. The notices detail the specific types of compromised information and offer complimentary credit monitoring services. The breach disclosure was filed with the Attorney General of Maine.
Source: https://straussborrelli.com/2026/01/14/posillico-data-breach-investigation/
Posillico Civil, Inc. cybersecurity rating report: https://www.rankiteo.com/company/posillico-incorporated
"id": "POS1768429853",
"linkid": "posillico-incorporated",
"type": "Breach",
"date": "12/2025",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'customers_affected': 'Impacted individuals',
'name': 'Posillico',
'type': 'Company'}],
'customer_advisories': 'Data breach notification letters mailed to impacted '
'individuals',
'data_breach': {'personally_identifiable_information': 'Yes',
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Name',
'Social Security number']},
'date_detected': '2025-12-08',
'date_publicly_disclosed': '2026-01-12',
'description': 'Posillico reported a data breach where sensitive personal '
'identifiable information may have been compromised. The '
'company discovered a network disruption on December 8, 2025, '
'and confirmed unauthorized access to sensitive data during '
'the breach.',
'impact': {'data_compromised': 'Sensitive personal identifiable information',
'identity_theft_risk': 'High',
'operational_impact': 'Network disruption',
'systems_affected': 'Network systems'},
'investigation_status': 'Completed',
'recommendations': 'Providing complimentary credit monitoring services to '
'affected individuals',
'references': [{'source': 'Attorney General of Maine'}],
'regulatory_compliance': {'regulatory_notifications': 'Filed breach notice '
'with the Attorney '
'General of Maine'},
'response': {'communication_strategy': 'Mailed data breach notification '
'letters to impacted individuals'},
'threat_actor': 'Unauthorized third party',
'title': 'Posillico Data Breach',
'type': 'Data Breach'}