HackingFinancial ServicesFinanceData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDFinancial accountHighContained

MBE CPAs

bd_d5c9e4424e2ef559 · schema v1 · pii pii-v1

Severity

High

Discovered

Apr 18, 2024

Filed

Jun 9, 2025

To disclose

14 months

Affected · nationwide

30,75012 in this filing

Linked

7 filings

Confidence

65%

Full breach record for MBE CPAs →2 incidents on file

MBE CPAs LLP, an accounting firm, experienced an external system breach (hacking) between April 15 and July 14, 2024. The incident was discovered on April 18, 2024. Approximately 30,750 individuals were affected, including 12 Maine residents. Compromised data included names, addresses, SSNs, and financial account information. MBE engaged forensic investigators, implemented MFA and enhanced monitoring, and offered credit monitoring services.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Apr 18, 2024 → Filed with AG Jun 9, 2025417d ✗ ME AG >90d14 months discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 3 days

discovery → filing · 14 months / 417 days

Apr 15, 2024

Begins

Apr 18, 2024

Discovered

Jun 9, 2025

Filed

vs. sector median

+51 wks slower

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

New Hampshire State AGbd_0854a7d7c693b5192025-06-06 · +3dVerified
Nebraska State AGbd_2b4e0c5dd8dc981d2025-05-28 · +12dVerified
New Hampshire State AGbd_a22a32d5848a8d412025-05-19 · +21dVerified
Nebraska State AGbd_2ba5a68ad1b6896c2025-05-13 · +27dVerified

Show 2 more filings ↓up to 27d gap

Massachusetts State AGbd_6f7b298888802b3b2025-05-13 · +27dVerified
Montana State AGbd_cda94f21ce7d38d52025-05-13 · +27dCandidate

Name: Wilson Elser Moskowitz Edelman & Dicker LLP
norm: wilson elser Moskowitz edelman dicker

Name: MBE CPAs
norm: mbe cpas
Industry: Financial Servicesllm

Discovered: Apr 18, 2024
Breach occurred: Apr 15, 2024 – Jul 14, 2024
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 9, 2025
Affected individuals: 30,750state + nationwide
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified Maine Attorney General
Initial access: exploit_public_facing

During the incident: Disconnected all access to the network
Engaged a specialized third-party cybersecurity firm to assist with securing the environment
Conducted a comprehensive forensic investigation
Engaged a third-party data mining firm to conduct a comprehensive review of the data
Mailed notice letters to affected individuals
Offered 12 months of complimentary credit monitoring and identity theft restoration services through TransUnion
Changes made: Implemented Sentinel One/Huntress with a 3-year proactive contract that includes monitoring and alerting
Implemented multifactor authentication for RMM tool and where supported
Implemented software patching
Updated password policies and requirements
Implemented audits for users, group policies, and scheduled tasks
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 months(417 days from discovery to filing)
Compliance flags: ME AG >90d · 417dME resident >180d · 386d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Apr 18, 2024
→ Filed with AG: Jun 9, 2025
417d 90 days ME AG >90d
Maine
Discovered: Apr 18, 2024
→ Notified: May 9, 2025
386d 180 days ME resident >180d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Apr 18, 2024 → Filed with AG: Jun 9, 2025	417d	90 days	ME AG >90d
Maine	Discovered: Apr 18, 2024 → Notified: May 9, 2025	386d	180 days	ME resident >180d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 5 states

View merged incident ↗

Nebraska State AGMay 13 · first

Massachusetts State AGMay 13 · first

Montana State AGMay 13 · first

New Hampshire State AG+6d

Nebraska State AG+15d

New Hampshire State AG+24d

Maine State AG+27d · this page

Pattern: first filing May 13 (NE), last Jun 9 (ME) — a 27-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/2a9eba75-0594-43fc-a50a-a2321d2e06d6.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 9, 2025
Raw hash: feca9d08dd074e5fbd148ac44e82230d2dc4612a87e6d9d4900a2c6477aa550d

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityWilson Elser Moskowitz Edelman & Dicker LLP

Victim entityMBE CPAs

Incidentdiscovered Apr 18, 2024

Stated responseDisconnected all access to the network

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov