HackingFinancial ServicesFinanceVulnerability ExploitSupply Chain (Dependency)Customer Data InvolvedData ExfiltratedIdentity (basic)Financial accountFinancial credentialsHigh

Financial Institution Service Corporation

bd_8bb15caef7090f5f · schema v1 · pii pii-v1

Severity

High

Discovered

May 31, 2023

Filed

Oct 4, 2023

To disclose

18 weeks

Affected · nationwide

237,67810 in this filing

Linked

2 filings

Confidence

65%

Full breach record for Financial Institution Service Corporation →10 incidents on file

Financial Institution Service Corporation (FISC) reported a data breach affecting 237,678 individuals due to the MOVEit Transfer third-party vulnerability. The breach occurred on May 30, 2023, and was discovered on May 31, 2023. Exposed data includes names and financial account numbers with their associated access codes. FISC began notifying affected individuals on October 4, 2023, and offered 12 months of credit monitoring and identity restoration services through Kroll.

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Maine clockDiscovered May 31, 2023 → Filed with AG Oct 4, 2023126d ✗ ME AG >90d18 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 1 days

discovery → filing · 18 weeks / 126 days

May 30, 2023

Begins

May 31, 2023

Discovered

Oct 4, 2023

Filed

vs. sector median

+10 wks slower

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

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

A leak claim by cl0p about this victim predates this filing by 89 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

California State AGbd_27aaa54311703cb42023-10-04Verified

Name: Financial Institution Service Corporation
norm: financial institution service
Domain: fiscdp.com

Name: Financial Institution Service Corporation
norm: financial institution service
Domain: fiscdp.com
Industry: Financial Servicesllm

Discovered: May 31, 2023
Breach occurred: May 30, 2023
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Oct 4, 2023
Affected individuals: 237,678state + nationwide
Data types: Identity (basic)Financial accountFinancial credentials
Data elements: Financial account number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1195 Supply Chain Compromise
Threat actor: External
Initial access: exploit_public_facing

During the incident: Provided 12 months of credit monitoring and identity restoration services through Kroll.
Sent written notification to affected consumers.
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 weeks(126 days from discovery to filing)
Compliance flags: ME AG >90d · 126dLeak >30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: May 31, 2023
→ Filed with AG: Oct 4, 2023
126d 90 days ME AG >90d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: May 31, 2023 → Filed with AG: Oct 4, 2023	126d	90 days	ME AG >90d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

California State AGOct 4 · first

Maine State AGOct 4 · 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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/e3b3f59d-b2de-44be-92b5-cf78b7b622b0.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 4, 2023
Raw hash: c5ead6a3108104d246ea82d4c8d36ae8e26493174c0de4e9f83c1f0e2a3411ad

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityFinancial Institution Service Corporation

Victim entityFinancial Institution Service Corporation

Incidentdiscovered May 31, 2023

Stated responseProvided 12 months of credit monitoring and identity restoration services through Kroll.

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov