HackingTechnologyRetail & ConsumerInformationVulnerability ExploitStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDCriticalContained

HENRY SCHEIN, INC.

bd_56c4470454da2707 · schema v1 · pii pii-v1

Severity

Critical

Discovered

Oct 14, 2023

Filed

Oct 23, 2024

To disclose

13 months

Affected · nationwide

166,432383 in this filing

Linked

3 filings

Confidence

65%

Full breach record for HENRY SCHEIN, INC. →6 incidents on file

Henry Schein, Inc. reported an external system breach (hacking) occurring on September 27, 2023, discovered on October 14, 2023. The incident affected 166,432 individuals nationwide, including 383 Maine residents. Personal information, including names and government identifiers, was accessed. The company engaged forensic experts, notified law enforcement, and provided 24 months of credit monitoring via Experian.

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Maine clockDiscovered Oct 14, 2023 → Filed with AG Oct 23, 2024375d ✗ ME AG >90d13 months 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 · 17 days

discovery → filing · 13 months / 375 days

Sep 27, 2023

Begins

Oct 14, 2023

Discovered

Oct 23, 2024

Filed

vs. sector median

+35 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Oregon State AGbd_08af0cc098dee9952024-10-23Candidate
California State AGbd_e5992f713925453b2024-10-23Verified

Name: HENRY SCHEIN, INC.
norm: henry schein
Domain: henryschein.com

Name: HENRY SCHEIN, INC.
norm: henry schein
Domain: henryschein.com
Industry: TechnologyllmRetail & Consumerllm

Discovered: Oct 14, 2023
Breach occurred: Sep 27, 2023
Undetected for: 17 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 17, 2023
Affected individuals: 166,432state + nationwide
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified Maine Attorney General
Initial access: exploit_public_facing

During the incident: Took certain systems offline
Notified relevant law enforcement authorities
Engaged outside cybersecurity and forensic information technology experts
Conducted an investigation to identify and remove any malicious files
Changes made: Implementing measures to fortify defenses going forward
Providing complimentary 24-month membership to Experian’s IdentityWorks
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 months(375 days from discovery to filing)
Compliance flags: ME AG >90d · 375d
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: Oct 14, 2023
→ Filed with AG: Oct 23, 2024
375d 90 days ME AG >90d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Oct 14, 2023 → Filed with AG: Oct 23, 2024	375d	90 days	ME AG >90d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Oregon State AGOct 23 · first

California State AGOct 23 · first

Maine State AGOct 23 · 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/f82cd01a-e412-41b0-ad21-635397ae3e2f.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 23, 2024
Raw hash: 9b7c8c4d3b96876f55c187c02fc71b1a8897daeb48f57ab1e1c3152dcc5534fd

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityHENRY SCHEIN, INC.

Victim entityHENRY SCHEIN, INC.

Incidentdiscovered Oct 14, 2023

Stated responseTook certain systems offline

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov