HackingManufacturingManufacturingData ExfiltratedCustomer Data InvolvedPIILowContained

AMERICAN VANGUARD CORPORATION

bd_6fae5b83538538d2 · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 7, 2025

Filed

Jun 30, 2026

To disclose

—

Affected

Not disclosed

Linked

4 filings

Confidence

65%

Full breach record for AMERICAN VANGUARD CORPORATION →

American Vanguard Corporation notified Nebraska residents of a data breach involving unauthorized network access from November 10 to December 7, 2025. Suspicious activity was detected on December 7, 2025. The incident involved the exfiltration of personal information (PII). The company engaged third-party experts and law enforcement, and is offering complimentary identity monitoring services to affected individuals.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >90d

Incident timeline

undetected · 27 days

Nov 10, 2025

Begins

Dec 7, 2025

Discovered

Jun 30, 2026

Filed

This filing is one of 4 about the same incident.View merged incident

A leak claim by osiris about this victim predates this filing by 172 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteosirisbd_f2c7a1030af0f9922026-01-09 · +172dVerified by operator

Regulatory filings (2) · sorted by filing gap

Indiana State AGbd_ed7bdc1d47811c7a2026-06-30Candidate
Massachusetts State AGbd_c92fd4e3d305d3522026-07-31 · +31dVerified

Name: AMERICAN VANGUARD CORPORATION
norm: american vanguard
Domain: american-vanguard.com

Name: AMERICAN VANGUARD CORPORATION
norm: american vanguard
Domain: american-vanguard.com
Industry: Manufacturingllm

Discovered: Dec 7, 2025
Breach occurred: Nov 10, 2025 – Dec 7, 2025
Undetected for: 27 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified law enforcement
Initial access: exploit_public_facing

During the incident: Worked with third-party cybersecurity experts to investigate and remediate that activity
Engaged a data-review firm to analyze those files’ contents
Notified law enforcement
Changes made: Offering you a complimentary <<ServiceTerminMonths>> month membership in Kroll’s identity monitoring service
Credit Monitoring, Fraud Consultation, and Identity Theft Restoration
Source: Quoted from the filing itself, not independently verified.

Compliance flags: Leak >90d
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 · 3 filings · 3 states

View merged incident ↗

Indiana State AGJun 30 · first

Nebraska State AGJun 30 · first · this page

Massachusetts State AG+31d

Pattern: first filing Jun 30 (IN), last Jul 31 (MA) — a 31-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://nebraska.gov/ago/data-breach/documents/51684320-b5a1-4b24-b5b5-2776657084a5.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 30, 2026
Raw hash: 8b43b330d6380b301c9250dda429f0af1155266c5848bf3bc047ef6d7baf2bfb

Linked disclosures

Ransomware claims (1)

Regulatory filings (2) · sorted by filing gap

Reporting entityAMERICAN VANGUARD CORPORATION

Victim entityAMERICAN VANGUARD CORPORATION

Incidentdiscovered Dec 7, 2025

Stated responseWorked with third-party cybersecurity experts to investigate and remediate that activity

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenancenebraska.gov