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

ERNST & YOUNG LLP

bd_342a8e17707d445d · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 31, 2023

Filed

Aug 9, 2023

To disclose

10 weeks

Affected

Not disclosed

Linked

15 filings

Confidence

64%

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

Ernst & Young LLP notified the California Attorney General of a data breach involving personal data of Bank of America customers. On May 31, 2023, EY was informed by third-party supplier Progress Software Corporation of a security vulnerability in the MOVEit Transfer solution. The breach window is May 27-31, 2023. Affected data may include names, addresses, financial account information, credit/debit card numbers, and Social Security numbers. EY engaged third-party security experts and is offering two years of complimentary identity theft protection via Experian.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d10 weeks discovery → filing

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

Delaware State AGbd_51121ff37fe0619a2023-08-09Verified
Massachusetts State AGbd_6468994aed51a5192023-08-09Verified by operator
Maine State AGbd_8403dcd75972f36e2023-08-09Verified
Indiana State AGbd_941fd2c5aa2026e22023-08-09Verified by operator

Show 6 more filings ↓up to 265d gap

Montana State AGbd_962a060b07cd01d62023-08-09Verified
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
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 4 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 9, 2023
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1195 Supply Chain Compromise
Threat actor: External
Third party: via Progress Software Corporation
Initial access: supply_chain

During the incident: Promptly 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
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: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 9 states

View merged incident ↗

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

California 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 (DE), 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://oag.ca.gov/ecrime/databreach/reports/sb24-571532
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: aa61117db256d441b66d12259894a06207ede3c52ab979e3f058b967e9f230da

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityERNST & YOUNG LLP

Victim entityERNST & YOUNG LLP

Incidentdiscovered May 31, 2023

Stated responsePromptly launched an investigation

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov