Duo County Telephone Cooperative Corporation Inc
bd_87fe4f1545c4e6e1 · schema v1 · pii pii-v1
Full breach record for Duo County Telephone Cooperative Corporation Inc →Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC (DBA DUO Broadband) notified the NH AG of a data breach affecting 3 New Hampshire residents. The incident occurred at a third-party billing vendor, Communications Data Group, Inc. (CDG). On Feb 13, 2025, CDG discovered a ransomware attempt and terminated unauthorized access. On Mar 17, 2025, CDG confirmed unauthorized access to DUO Broadband customer data. No evidence of misuse was found. DUO Broadband retained legal counsel and engaged Kroll for credit monitoring.
J jump to incidentP pin to compareR raw source
Incident timeline
Feb 13, 2025
Discovered
May 15, 2025
Filed
Linked disclosures
Why this link?Regulatory filings (2) · sorted by filing gap
- Indiana State AGbd_1f4bbfe1afc888a52025-05-15Candidate
- Maine State AGbd_aa25a3c747474b682025-05-15Verified
Filing propagation · 3 filings · 3 states
View merged incident ↗Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.