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DUO Broadband Data Breach Investigation

Written by Joseph Lyon on . Posted in Data Breach.

The data breach lawyers at The Lyon Firm are reviewing a recently reported data security incident at DUO County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC, companies that officially do business as DUO Broadband. The alleged DUO Broadband data breach may have involved a large amount of sensitive personal identifiable information (PII) belonging to more than 42,500 individuals.

If you receive a data breach notification letter from DUO Broadband that details what personal data of yours that could be compromised, it is important to understand future risks of fraud and identity theft. Contact our legal team to learn more about what steps to take to protect yourself and to consider legal action in the wake of a data breach.

Free consultations and case reviews are available with our staff. The Firm has filed numerous class action data breach lawsuits on behalf of clients nationwide and has settled cases in order to rightfully compensate impacted plaintiffs.

What Happened at DUO Broadband?

DUO Broadband recently reported the alleged breach to the Attorney General of Maine, noting that certain sensitive personal identifiable information in its possession may have been compromised. According to the breach notice sent to the AG of Maine, on February 13, 2025, DUO Broadband became aware of a suspicious IT incident in which a cyber threat actor attempted to disrupt its network.

After an investigation, DUO confirmed that sensitive personal information belonging to around 42,000 customers in its systems may have been accessed and acquired. The type of data impacted varies depending on the individual, but the type of exposed information potentially includes the following:

  • Name
  • Social Security number
  • Address
  • Date of birth

On May 15, 2025, DUO Broadband started mailing data breach notification letters to impacted individuals. Based out of Jamestown, Kentucky, DUO is a telecommunications and entertainment company offering telephone and internet services to individuals and businesses in Kentucky. The company offers fiber-optic internet, TV streaming, and land-line telephone services.