MisuseProfessional ServicesProfessional ServicesPrivilege AbuseEmployee Data InvolvedTargetedGovernment IDPIIHighContained

Plante & Moran

bd_1cd5541dd58c5d36 · schema v1 · pii pii-v1

Severity

High

Discovered

Apr 23, 2023

Filed

May 14, 2023

To disclose

21 days

Affected · nationwide

4,2302 in this filing

Linked

2 filings

Confidence

64%

Full breach record for Plante & Moran →2 incidents on file

Plante & Moran PLLC reported an insider wrongdoing incident on April 23, 2023, affecting 4,230 individuals, including 2 Maine residents. The breach involved the acquisition of names and Social Security Numbers. The firm notified affected individuals in writing and provided two years of credit monitoring and identity theft restoration services through Experian.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Apr 23, 2023 → Filed with AG May 14, 202321d ✓ ME AG ≤30d21 days discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 21 days

Apr 23, 2023

Begins

Apr 23, 2023

Discovered

May 14, 2023

Filed

vs. sector median

16 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Indiana State AGbd_e76663863b290fe62023-05-12 · +2dVerified

Name: Plante & Moran
norm: plante moran

Name: Plante & Moran
norm: plante moran
Industry: Professional Servicesllm

Discovered: Apr 23, 2023
Breach occurred: Apr 23, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 23, 2023
Affected individuals: 4,230state + nationwide
Data types: Government IDPII
Data elements: Social Security number
Attack vector: Insider
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: Internal
Regulator citations: Filed Data Breach Notice with Maine Attorney General
Initial access: insider_action

During the incident: Sent written notification to affected individuals
Offered 2 Years of Credit Monitoring and Identity Theft Restoration through Experian
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 21 days(21 days from discovery to filing)
Compliance flags: ME AG ≤30d · 21d
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Apr 23, 2023
→ Filed with AG: May 14, 2023
21d 30 days ME AG ≤30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Apr 23, 2023 → Filed with AG: May 14, 2023	21d	30 days	ME AG ≤30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Indiana State AGMay 12 · first

Maine State AG+2d · 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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/0d7db9f3-e2cd-480c-be4c-437f022fcfbe.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 14, 2023
Raw hash: 4c2d4771508445342d351cf33c0fd359d68454fce22f60dedc62493ef9661416

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityPlante & Moran

Victim entityPlante & Moran

Incidentdiscovered Apr 23, 2023

Stated responseSent written notification to affected individuals

ComplianceME AG ≤30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov