HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Tami J. Dunham, CPA

bd_c0e9c7d2f05b25f2 · schema v1 · pii pii-v2

Severity

Medium

Discovered

May 24, 2025

Filed

Nov 26, 2025

To disclose

—

Affected

2state residents only

Linked

4 filings

Confidence

65%

Full breach record for Tami J. Dunham, CPA →

Tami J Dunham CPA, a California-based accounting firm, reported unauthorized access to its network between May 24-26, 2025. An unknown actor accessed and downloaded files containing names and Social Security numbers of approximately two Nebraska residents. Notices were sent on November 26, 2025, offering one year of credit monitoring through Epiq. The firm engaged forensic specialists, reported to federal law enforcement, and changed its external IT provider.

J jump to incidentP pin to compareR raw source

Incident timeline

May 24, 2025

Begins

May 24, 2025

Discovered

Nov 26, 2025

Filed

This filing is one of 4 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Massachusetts State AGbd_1785f2e4a0a5189f2025-11-26Verified
Maine State AGbd_3977ffba57ce2eea2025-11-26Candidate
California State AGbd_67946750d4824c2a2025-11-26Verified

Name: Tami J. Dunham, CPA
norm: tami j dunham cpa

Name: Tami J. Dunham, CPA
norm: tami j dunham cpa
Industry: Professional Servicesllm

Discovered: May 24, 2025
Breach occurred: May 24, 2025 – May 26, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 26, 2025
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Took steps to secure its systems
Launched an investigation with the assistance of third-party cybersecurity and digital forensics specialists
Reported the event to federal law enforcement
Undertook a comprehensive third-party data review
Reviewed its internal records
Implemented additional cybersecurity safeguards and training to its employees
Providing access to credit monitoring and identity restoration services for one (1) year, through Epiq Global
Established a dedicated assistance telephone line
Changes made: Reviewed our existing policies and procedures
Enhanced certain administrative and technical controls
Changed our external IT firm to reduce the likelihood of a similar future event
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 · 4 filings · 4 states

View merged incident ↗

Massachusetts State AGNov 26 · first

Maine State AGNov 26 · first

California State AGNov 26 · first

Nebraska State AGNov 26 · 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/6967097a-2e51-48c8-8b21-939ae8835d79.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 26, 2025
Raw hash: 4aa4c198fca822a63f8c6bf9b9f5a8e73862d30c5750b0afff415f0100850587

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityTami J. Dunham, CPA

Victim entityTami J. Dunham, CPA

Incidentdiscovered May 24, 2025

Stated responseTook steps to secure its systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov