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Case File: Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband Data Breach

This file collects the dated facts on record for the Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband incident. The state report is dated May 15, 2025.

Timeline

  1. May 15, 2025Report filed in New HampshireDate the notice was lodged with the New Hampshire Attorney General.

Case facts

Filing state
New Hampshire
Date reported
May 15, 2025
Receiving office
New Hampshire Attorney General

Case notes

DUO Broadband, which operates as Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC, has publicly reported a data security incident impacting its systems. The New Hampshire-based company filed an official notice regarding this breach on May 15, 2025, alerting regulators to the event.

While the precise nature of the incident remains unspecified, DUO Broadband has confirmed that personal information may have been compromised. The company has not yet disclosed the specific types of data involved or the total number of individuals who may have been affected by this event.

At present, the incident is still under investigation by DUO Broadband. This ongoing process aims to determine the full scope of the breach, including how it occurred and the specific data that may have been accessed or exfiltrated by unauthorized parties.

Individuals who may be impacted by this breach are advised to remain vigilant. It is always a good practice to regularly review financial statements and credit reports for any signs of unusual or unauthorized activity. Consider enabling multi-factor authentication on online accounts where available.

This information is derived from public data breach filings made with state regulators, providing a factual record of the reported incident. DUO Broadband will likely provide further updates as their investigation progresses.

Questions about this case file

Where does the Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband case file come from?
Every entry is taken from the breach report Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband lodged with the New Hampshire Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?
Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?
It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?
Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

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New Hampshire data breaches

Filing source: New Hampshire Attorney General