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Hallisey & D'Agostino, LLP data breach investigation

Hallisey & D'Agostino, LLP, a Vermont-based legal firm, has confirmed a significant data breach impacting a wide range of sensitive client information. This incident could lead to severe risks, including identity theft and financial fraud, for those whose data was compromised.

Filed
April 18, 2026
Regulator
Vermont AG
People affected
Not stated
File status
Monitoring

What the filing confirms

  • Hallisey & D'Agostino, LLP reported the incident to the Vermont Attorney General.
  • Information involved: Full Name, Social Security Number, Date of Birth, Home Address, Financial Account Details, Tax Return Information, Legal Correspondence and Case Files, Direct Deposit Information, Phone Number and Email Address.

Still unknown

  • How many people were affected. The filing does not give a number.
  • What caused the incident beyond the description in the filing.
  • How the attackers got in, and whether basic safeguards such as multi-factor sign-in were in place.
Read the filing at the source

Investigation notes

Hallisey & D'Agostino, LLP, a professional services firm specializing in legal representation, reported a data security incident to the Vermont Attorney General on April 18, 2026. While the specific nature of the breach remains unspecified in the public record, such incidents at law firms often involve unauthorized network access or compromised digital infrastructure.

The firm's filing indicates that a substantial amount of highly sensitive personal and confidential data was exposed. The compromised data categories include Full Name, Social Security Number, Date of Birth, Home Address, Financial Account Details, Tax Return Information, Legal Correspondence and Case Files, Direct Deposit Information, and Phone Number and Email Address. This breadth of exposed information presents a high risk of identity theft, financial fraud, and targeted scams for affected individuals.

Given the nature of its practice, Hallisey & D'Agostino, LLP was entrusted with protecting this confidential information under state data protection statutes and common law. The occurrence of a breach of this magnitude raises critical questions about the adequacy of the firm's cybersecurity measures, including its protocols for safeguarding client data, managing network security, and responding to potential threats. Our investigation will examine these elements to understand whether industry standards and legal obligations were met.

If you have received a notification letter from Hallisey & D'Agostino, LLP, it serves as formal confirmation that your private information was compromised. This notification establishes your legal standing to consider participation in a class action lawsuit, which aims to hold the firm accountable for potential security failures and seek compensation for affected individuals. It is not necessary to have experienced out-of-pocket financial losses to explore your legal options.

Understanding your rights and potential recourse in the wake of a data breach can be complex. We offer confidential case reviews to individuals affected by this incident. There is no cost or obligation to speak with our team about the Hallisey & D'Agostino, LLP data breach and how it might impact you.

What our attorneys examine

A cyberattack does not excuse a company from protecting the information it holds. We look at whether Hallisey & D'Agostino, LLP used reasonable security, how long it kept the data, and how quickly it told the people affected. Those questions decide whether a class action or individual claim is possible. Read more on how ransomware lawsuits work, or browse other incident files in Vermont.

Hallisey & D'Agostino, LLP data breach questions

How many people were affected by the Hallisey & D'Agostino, LLP 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, Home Address, Financial Account Details, Tax Return Information, Legal Correspondence and Case Files, Direct Deposit Information, Phone Number and Email Address. Your own letter is the best guide to what was exposed about you, since notices are usually tailored to each person.
Is the Hallisey & D'Agostino, LLP data breach letter legit or a scam?
A notice from Hallisey & D'Agostino, LLP in the mail matches the breach Hallisey & D'Agostino, LLP reported to the Vermont Attorney General on April 18, 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 Hallisey & D'Agostino, LLP through a phone number or website you find yourself.
Did Hallisey & D'Agostino, LLP offer free credit monitoring?
Any free monitoring Hallisey & D'Agostino, LLP is offering will be described in the notice you received, along with an activation code and a sign-up deadline. Because Social Security numbers are listed in this filing, identity monitoring and a credit freeze matter more than usual. Using the free service won't stop you from joining a lawsuit or settlement later.
Is there a Hallisey & D'Agostino, LLP 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 Hallisey & D'Agostino, LLP. 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.
What should I do after getting the Hallisey & D'Agostino, LLP 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.
Where can I see the official Hallisey & D'Agostino, LLP breach notice?
Hallisey & D'Agostino, LLP's report is published by the Vermont Attorney General: https://ago.vermont.gov/categories/security-breach-notices#hallisey-d-agostino-llp-2026-04-18 Compare it with the letter you received to confirm the dates and details match.
Do I need a Hallisey & D'Agostino, LLP 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.
Can I sue Hallisey & D'Agostino, LLP 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 Hallisey & D'Agostino, LLP data breach settlement or claim be worth?
There is no set amount, and no Hallisey & D'Agostino, LLP 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.

Other open files in Vermont

Attorney advertising. An incident file reflects a public regulator filing and our review of it; it does not mean a lawsuit has been filed or that the company did anything unlawful. Submitting a review request does not create an attorney-client relationship.