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 records

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

10 wks faster

This filing is one of 15 records 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 was first seen 47 days before this filing.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