DUO Broadband Reports Data Security Incident to New Hampshire AG

DUO Broadband, operating as Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC, has notified the New Hampshire Attorney General about a data security incident. This report indicates unauthorized access to their systems, potentially involving customers' personal information. Individuals who received a notification letter should review the details provided by the company.

State: New Hampshire
Reported: May 15, 2025

DUO Broadband, the telecommunications provider known as Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC, officially filed a data security incident report with the New Hampshire Attorney General on May 15, 2025. This filing acknowledges unauthorized access occurred within their systems, prompting an investigation into the scope and impact of the event.

The incident involves DUO Broadband's systems, which typically hold sensitive customer data necessary for providing internet, telephone, and cellular services. At this time, the company is investigating the security incident.

While the public record does not specify the exact types of information accessed, DUO Broadband has indicated that personal information was likely involved. Therefore, individuals who received a direct notification from the company should carefully review that communication for specifics regarding the data elements that may have been exposed.

Receiving a data breach notification letter from DUO Broadband means your information was identified as potentially compromised in this incident. Such letters are formal notices designed to inform you about the event and the specific data elements that were involved, as determined by the company's internal investigation.

As a general precaution following any data security event, it is advisable to remain vigilant. Monitor your accounts and credit reports for any unusual activity. If you identify any suspicious transactions or unauthorized use of your information, promptly report it to the relevant financial institutions or service providers.

What to do if you were affected

These general steps can help limit the risk of identity theft and fraud after any data breach.

Stay alert to targeted scams
Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.
Keep your notification letter
Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

What to know about the Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband data breach

What should I do after getting the Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband data breach notice?: Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
Is the Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband data breach letter legit or a scam?: A notice from Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband in the mail matches the breach Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband reported to the New Hampshire Attorney General on May 15, 2025. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband through a phone number or website you find yourself.
Did Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband offer free credit monitoring?: Any free monitoring Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband is offering will be described in the notice you received, along with an activation code and a sign-up deadline. Using the free service won't stop you from joining a lawsuit or settlement later.
Can I sue Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband over the data breach?: It depends on what was exposed, the law in New Hampshire and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
Is there a Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband data breach class action lawsuit?: Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
How much could a Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband data breach settlement or claim be worth?: There is no set amount, and no Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. Keep receipts and records; they're what damages claims are built on.
Do I need a Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband data breach lawyer or attorney?: An attorney can read your notice and tell you whether a claim makes sense. A case review here is free, and data breach cases are usually handled on contingency, so there is no upfront cost.

Related data breach cases

Browse all New Hampshire data breaches View the full case directory