HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedPIIIdentity (basic)LowContained

Normandin, Cheney & O'Neil PLLC

bd_f94d44908ad2344c · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 24, 2025

Filed

Aug 12, 2026

To disclose

—

Affected

Not disclosed

Linked

3 filings

Confidence

65%

Full breach record for Normandin, Cheney & O'Neil PLLC →4 incidents on file

Normandin, Cheney & O’Neil, PLLC, a law firm, disclosed a cybersecurity incident affecting client information. Unauthorized network access occurred between Dec 20-24, 2025, discovered on Dec 24, 2025. The firm copied certain information, potentially including names and contact details. Notices were mailed starting July 15, 2026. The firm notified law enforcement, changed passwords, and provided 12 months of credit monitoring. At least 26 Rhode Island residents were identified.

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Incident timeline

undetected · 4 days

Dec 20, 2025

Begins

Dec 24, 2025

Discovered

Aug 12, 2026

Filed

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

New Hampshire State AGbd_893522279e36d56a2026-08-12Verified
Massachusetts State AGbd_e4e1e2c7427446662026-08-12Candidate

Name: Normandin, Cheney & O'Neil PLLC
norm: normandin cheney o neil

Name: Normandin, Cheney & O'Neil PLLC
norm: normandin cheney o neil
Industry: Professional Servicesllm

Discovered: Dec 24, 2025
Breach occurred: Dec 20, 2025 – Dec 24, 2025
Undetected for: 4 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 15, 2026
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: notified law enforcement
Initial access: valid_credentials

During the incident: Notified law enforcement
Conducted a thorough investigation
Changed network passwords
Reviewed our policies and procedures
Providing you access to free credit monitoring and identity protection services
Changes made: Changed network passwords
Reviewed our policies and procedures
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

New Hampshire State AGAug 12 · first

Massachusetts State AGAug 12 · first

Nebraska State AGAug 12 · first · this page

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://nebraska.gov/ago/data-breach/documents/d7d0442f-ca7a-4f71-9fb9-c79099dd4160.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 12, 2026
Raw hash: da4a6c58d7732c158c13bb0deeb910bc028fd6bc4ecc18cc21c9bb8132697244

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityNormandin, Cheney & O'Neil PLLC

Victim entityNormandin, Cheney & O'Neil PLLC

Incidentdiscovered Dec 24, 2025

Stated responseNotified law enforcement

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov