HackingProfessional ServicesProfessional ServicesVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedIdentity (basic)Government IDFinancial accountMediumContained

ERNST & YOUNG LLP

bd_962a060b07cd01d6 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 31, 2023

Filed

Aug 9, 2023

To disclose

10 weeks

Affected

238state residents only

Linked

15 filings

Confidence

66%

Full breach record for ERNST & YOUNG LLP →5 incidents on file

Ernst & Young LLP notified Montana residents of a data breach involving its third-party vendor, Progress Software Corporation. A vulnerability in the MOVEit Transfer solution compromised personal data including names, addresses, SSNs, and financial account numbers. EY launched an investigation and secured systems. Bank of America, an EY client, was not impacted. EY is offering two years of identity theft protection via Experian.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d10 weeks 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

discovery → filing · 10 weeks / 70 days

May 31, 2023

Discovered

Aug 9, 2023

Filed

vs. sector median

9 wks faster

This filing is one of 15 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 47 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

California State AGbd_342a8e17707d445d2023-08-09Verified
Delaware State AGbd_51121ff37fe0619a2023-08-09Verified
Massachusetts State AGbd_6468994aed51a5192023-08-09Verified by operator
Maine State AGbd_8403dcd75972f36e2023-08-09Verified

Show 6 more filings ↓up to 265d gap

Indiana State AGbd_941fd2c5aa2026e22023-08-09Verified by operator
Oregon State AGbd_43034954cfbe06cc2023-08-22 · +13dVerified
Indiana State AGbd_74745e5983f6eb6e2023-08-24 · +15dVerified by operator
South Carolina State AGbd_1a497359484fd3612023-08-28 · +19dVerified by operator
Massachusetts State AGbd_acdd5c6a642710682023-08-29 · +20dVerified by operator
New Hampshire State AGbd_d769d3dcc09c3cbc2024-04-30 · +265dVerified

Showing first 10 of 14 linked disclosures.

Name: ERNST & YOUNG LLP
norm: ernst young
Domain: ey.com

Name: ERNST & YOUNG LLP
norm: ernst young
Domain: ey.com
Industry: Professional Servicesllm

Discovered: May 31, 2023
Materiality determined: —
Notification sent: Aug 9, 2023
Affected individuals: 238state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Third party: via Progress Software Corporation
Initial access: exploit_public_facing

During the incident: Launched an investigation
Took steps to secure our systems
Working with third-party security experts to investigate the scope of the issue and advise on our response
Changes made: Notifying affected individuals
Offering complimentary two-year membership in an identity theft protection service provided by Experian IdentityWorks
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(70 days from discovery to filing)
Compliance flags: Leak >30d
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.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 9 states

View merged incident ↗

California State AGAug 9 · first

Delaware State AGAug 9 · first

Massachusetts State AGAug 9 · first

Maine State AGAug 9 · first

Indiana State AGAug 9 · first

Montana State AGAug 9 · first · this page

Oregon State AG+13d

Indiana State AG+15d

South Carolina State AG+19d

Massachusetts State AG+20d

New Hampshire State AG+265d

Pattern: first filing Aug 9 (CA), last Apr 30 (NH) — a 265-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 14 — the full spread may be wider.

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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-531.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 9, 2023
Raw hash: 89866da89f0123c770669f9f993746b9b7f4c3f612912519ecf8d6ae79378dba

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityERNST & YOUNG LLP

Victim entityERNST & YOUNG LLP

Incidentdiscovered May 31, 2023

Stated responseLaunched an investigation

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenancedojmt.gov