HackingRetail & ConsumerRetailStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

MWI Veterinary Supply, Inc.

bd_c607081831255b90 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 30, 2024

Filed

Nov 4, 2024

To disclose

5 weeks

Affected

31state residents only

Linked

7 filings

Confidence

66%

Full breach record for MWI Veterinary Supply, Inc. →2 incidents on file

MWI Veterinary Supply, Inc. notified affected individuals in Montana and other states of a data security incident confirmed on September 30, 2024. The incident involved unauthorized access to personal information including names, addresses, SSNs, driver's licenses, and health insurance data. The incident is contained. MWI engaged law enforcement and cybersecurity experts, and is offering 24 months of credit monitoring via Experian.

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Incident timeline

discovery → filing · 5 weeks / 35 days

Sep 30, 2024

Discovered

Nov 4, 2024

Filed

vs. sector median

2 wks faster

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

Vermont State AGbd_106866268166cc202024-11-04Verified
Indiana State AGbd_417cec55efa00f862024-11-04Verified
Maine State AGbd_881516599e930adb2024-11-04Candidate
Massachusetts State AGbd_c165b2aa6399e4402024-11-04Verified

Show 2 more filings ↓up to 8d gap

California State AGbd_e02a7dd25f3a11812024-11-04Verified
New Hampshire State AGbd_68374ced74ce1a742024-11-12 · +8dVerified

Name: MWI Veterinary Supply, Inc.
norm: mwi veterinary supply

Name: MWI Veterinary Supply, Inc.
norm: mwi veterinary supply
Industry: Retail & Consumerllm

Discovered: Sep 30, 2024
Materiality determined: —
Notification sent: Nov 4, 2024
Affected individuals: 31state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: assistance of law enforcement
Initial access: valid_credentials

During the incident: Launched an investigation with the assistance of cybersecurity experts, law enforcement, and outside lawyers
Reviewed the impacted data to determine whether personal information was compromised
Working with cybersecurity experts to reinforce our systems and information security protocols
Providing you with access to Experian IdentityWorks SM credit monitoring and remediation services for 24 months at no charge
Changes made: Reinforce our systems and information security protocols in an effort to prevent incidents like this from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(35 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Vermont State AGNov 4 · first

Indiana State AGNov 4 · first

Maine State AGNov 4 · first

Massachusetts State AGNov 4 · first

California State AGNov 4 · first

Montana State AGNov 4 · first · this page

New Hampshire State AG+8d

Pattern: first filing Nov 4 (VT), last Nov 12 (NH) — a 8-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/2024/11/Consumer-notification-letter-21.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 4, 2024
Raw hash: 8603c128326a0b4595047dfe13bb3c9ad6f540f4faf3c86e27e38691cb8d1ca6

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityMWI Veterinary Supply, Inc.

Victim entityMWI Veterinary Supply, Inc.

Incidentdiscovered Sep 30, 2024

Stated responseLaunched an investigation with the assistance of cybersecurity experts, law enforcement, and outside lawyers

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov