HackingRetail & ConsumerTechnologyRetailVulnerability ExploitStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)MediumContained

AutoNation, Inc.

bd_02c1dec26ae275ca · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 20, 2024

Filed

Dec 19, 2024

To disclose

30 weeks

Affected

4,568state residents only

Linked

4 filings

Confidence

64%

Full breach record for AutoNation, Inc. →4 incidents on file

CrossCheck, Inc. reported unauthorized access to its merchant portal between May 18-20, 2024, affecting customer data for AutoNation, Inc. The breach exposed names and limited personal information. CrossCheck notified federal law enforcement, enhanced network security policies, and offered credit monitoring to affected individuals. Notices were sent in March 2025.

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Incident timeline

undetected · 2 days

discovery → filing · 30 weeks / 213 days

May 18, 2024

Begins

May 20, 2024

Discovered

Dec 19, 2024

Filed

vs. sector median

+23 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Nebraska State AGbd_11c3ad79193326872025-03-04 · +75dVerified
Maine State AGbd_bcb09ac65f4f2fcb2025-03-04 · +75dVerified
Maryland State AGbd_c158c2a75bf30f3e2025-03-04 · +75dVerified

Name: CrossCheck, Inc.
norm: crosscheck

Name: AutoNation, Inc.
norm: autonation
Domain: autonation.com
Industry: Retail & ConsumerllmTechnologyllm

Discovered: May 20, 2024
Breach occurred: May 18, 2024 – May 20, 2024
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 4, 2025
Affected individuals: 4,568state-resident count only
Data types: Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: reported this event to federal law enforcement
Initial access: exploit_public_facing

During the incident: Launched an investigation into the nature and scope of the activity
Undertook a comprehensive review of the accessible data
Undertook a further review of its internal files
Worked with AutoNation to identify necessary address information
Reported this event to federal law enforcement
Notifying individuals and regulators
Offering notified individuals access to complimentary credit monitoring
Changes made: Reviewing and enhancing our existing policies and procedures related to network security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 30 weeks(213 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Montana State AGDec 19 · first · this page

Nebraska State AG+75d

Maine State AG+75d

Maryland State AG+75d

Pattern: first filing Dec 19 (MT), last Mar 4 (MD) — a 75-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/2025/03/Consumer-notification-letter-108.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 19, 2024
Raw hash: 44884f67df88afdbad05294072c330dc0ef90e26e010705102cba840b907fa0d

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityCrossCheck, Inc.

Victim entityAutoNation, Inc.

Incidentdiscovered May 20, 2024

Stated responseLaunched an investigation into the nature and scope of the activity

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov