HackingProfessional ServicesProfessional ServicesVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHighResolved

ERNST & YOUNG LLP

bd_f2b7e0ce70ee52a5 · schema v1 · pii pii-v1

Severity

High

Discovered

May 31, 2023

Filed

Aug 9, 2023

To disclose

10 weeks

Affected

3,571state residents only

Linked

15 filings

Confidence

70%

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

Supplemental notice from King & Spalding LLP on behalf of Ernst & Young LLP (EY US) regarding a security incident involving Progress Software's MOVEit Transfer solution. The incident affected 3,571 Washington residents, up from an initial count of 1,129. Data exposed included names, addresses, financial account info, credit card numbers, SSNs, and government IDs. EY US engaged forensic experts, secured systems, and offered 24 months of credit monitoring. The investigation is now complete.

J jump to incidentP pin to compareR raw source

Washington clock⏱ WA AG >30d10 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 · 4 days

discovery → filing · 10 weeks / 70 days

May 27, 2023

Begins

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: King & Spalding LLP
norm: king spalding

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

Discovered: May 31, 2023
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 4 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 9, 2023
Affected individuals: 3,571state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: NameSocial Security numberFinancial account number
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Regulator citations: Notified Washington Attorney General on August 9, 2023Submitted supplemental notice to Washington Attorney General on April 30, 2024
Third party: via Progress Software
Initial access: supply_chain

During the incident: Launched an investigation
Took steps to secure its systems
Working with third-party security experts to investigate the scope of the issue and advise on its response
Performed an extensive analysis of the affected files
Notifying individuals whose personal information may have been accessed
Offering 24-month complimentary subscription to Experian’s credit monitoring and identity theft restoration services
Established a call center to answer consumers’ questions
Changes made: Secured systems
Provided complimentary credit monitoring and identity theft restoration services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(70 days from discovery to filing)
Compliance flags: WA AG >30dLeak >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.

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

Washington 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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA26147.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: 34bb014b56a55c27f0b4c523f8a9a60882f797732a1dec7086d4ea780c1909f6

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityKing & Spalding LLP

Victim entityERNST & YOUNG LLP

Incidentdiscovered May 31, 2023

Stated responseLaunched an investigation

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com