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MonitoringVermont AG filing · September 4, 2026

Green Mountain Power Reports Data Incident Affecting Vermont Customers

Green Mountain Power, a Vermont utility provider, reported a data security incident on September 4, 2026, impacting an unspecified number of its customers. The incident exposed sensitive personal and financial data, potentially putting individuals at risk of identity theft and fraud.

State
Vermont
Reported
September 4, 2026

What may have been exposed

  • Full Name
  • Social Security Number
  • Date of Birth
  • Mailing Address
  • Financial Account Number
  • Routing Number
  • Energy Consumption and Usage History
  • Email Address

Green Mountain Power, a utility serving customers across Vermont, filed notice of a data security incident on September 4, 2026. This report, filed with regulatory bodies, indicates a compromise of customer information. The company has stated that an investigation into the nature and scope of the incident is ongoing.

The reported data exposure includes a range of personal identifiers and financial details. Specifically, the compromised information includes Full Name, Social Security Number, Date of Birth, Mailing Address, Financial Account Number, Routing Number, Energy Consumption and Usage History, and Email Address. These details were identified as part of the security event.

The exposure of such comprehensive personal and financial data carries significant risks for affected individuals. Compromised Social Security Numbers and Dates of Birth can be used for identity theft, potentially leading to fraudulent accounts or tax filings. Financial Account Numbers and Routing Numbers could expose individuals to direct financial fraud.

Energy Consumption and Usage History, while seemingly innocuous, can reveal patterns of occupancy or habits, which could be exploited. Email addresses are often used in phishing attempts to gain further access to personal accounts.

Individuals who receive a formal notification from Green Mountain Power should remain vigilant. It is recommended to carefully review financial statements and credit reports for any suspicious or unauthorized activity. Consider placing a fraud alert or credit freeze with the major credit bureaus to help prevent new accounts from being opened in your name.

Additionally, exercise caution regarding unsolicited communications, especially those requesting personal or financial information. Only respond to legitimate inquiries through verified contact methods. These are general protective steps for any data incident.

What to do if you were affected

Based on the categories of information reported in this filing, these steps can help limit the risk of identity theft and fraud.

  • Freeze your credit

    Place a free credit freeze with Equifax, Experian, and TransUnion. A freeze blocks new accounts from being opened in your name and can be lifted anytime.

  • Watch your financial accounts

    Review bank and card statements for unfamiliar activity and turn on transaction alerts. Report anything you don't recognize to your bank right away.

  • Secure your online accounts

    Change the password on any account that reused an exposed password and turn on two-factor authentication wherever it's offered.

  • 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.

Green Mountain Power breach filing: questions and answers

Where can I see the official Green Mountain Power breach notice?
Green Mountain Power's report is published by the Vermont Attorney General: https://ago.vermont.gov/categories/security-breach-notices#green-mountain-power-2026-09-04 Compare it with the letter you received to confirm the dates and details match.
How many people were affected by the Green Mountain Power data breach, and what was exposed?
The filing does not give a count of affected people and lists the following information as involved: Full Name, Social Security Number, Date of Birth, Mailing Address, Financial Account Number, Routing Number, Energy Consumption and Usage History, Email Address. Your own letter is the best guide to what was exposed about you, since notices are usually tailored to each person.
Is there a Green Mountain Power 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 Green Mountain Power. 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.
Is the Green Mountain Power data breach letter legit or a scam?
A notice from Green Mountain Power in the mail matches the breach Green Mountain Power reported to the Vermont Attorney General on September 4, 2026. 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 Green Mountain Power through a phone number or website you find yourself.
Can I sue Green Mountain Power over the data breach?
It depends on what was exposed, the law in Vermont 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.
How much could a Green Mountain Power data breach settlement or claim be worth?
There is no set amount, and no Green Mountain Power 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. The filing lists Full Name, Social Security Number, Date of Birth as involved. Keep receipts and records; they're what damages claims are built on.
Did Green Mountain Power offer free credit monitoring?
Check your letter from Green Mountain Power. If free credit or identity monitoring is offered, the enrollment code and deadline are printed in the notice itself. Because Social Security numbers are listed in this filing, identity monitoring and a credit freeze matter more than usual. Signing up doesn't waive any legal rights you may have.
Do I need a Green Mountain Power 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.
What should I do after getting the Green Mountain Power 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.

Source: Vermont Attorney General filing

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