HackingTransportation & LogisticsTechnologyTransportationVulnerability ExploitZero-DaySupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHealth (basic)CVE-2024-50623CVE-2024-55956MediumContained

Hertz Corporation (Cleo Communications US LLC)

bd_882b1f89a3b508cf · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 10, 2025

Filed

Apr 11, 2025

To disclose

9 weeks

Affected

Not disclosed

Confidence

66%

Full breach record for Hertz Corporation (Cleo Communications US LLC) →

Hertz Corporation notified Iowa AG of a data breach involving vendor Cleo Communications US LLC. An unauthorized third party exploited zero-day vulnerabilities (CVE-2024-50623, CVE-2024-55956) in Cleo's file transfer platform in Oct/Dec 2024 to acquire Hertz data. Hertz confirmed the incident on Feb 10, 2025. Impacted data includes names, contact info, DOB, payment card info, driver's license info, and workers' comp/medical data. Notifications began April 11, 2025, including 2 years of Kroll identity monitoring.

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Iowa clock✓ IA AG ≤5 bday9 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 132 days

discovery → filing · 9 weeks / 60 days

Oct 1, 2024

Begins

Feb 10, 2025

Discovered

Apr 11, 2025

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: Winston & Strawn LLP
norm: winston strawn

Name: Hertz Corporation (Cleo Communications US LLC)
norm: hertz corporation cleo communications us
Industry: Transportation & LogisticsllmTechnologyllm

Discovered: Feb 10, 2025
Breach occurred: Oct 1, 2024 – Dec 31, 2024
Undetected for: 132 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 11, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial accountHealth (basic)
Data elements: Social Security numberDate of birth
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Regulator citations: Reporting the event to relevant regulators, including the Iowa Office of the Attorney General
Third party: via Cleo Communications US LLC
Initial access: supply_chain
CVE references: CVE-2024-50623 CVE-2024-55956

During the incident: Reported this event to law enforcement
Secured the services of Kroll to provide two years of identity monitoring services
Notified potentially impacted individuals via email and through a notice on Hertz’s websites
Mailed notification letters to potentially impacted individuals
Changes made: Cleo took steps to investigate the Event and address the identified vulnerabilities
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 days from discovery to filing)
Compliance flags: IA AG ≤5 bday
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

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.iowaattorneygeneral.gov/media/cms/4112025_The_Hertz_Corporation_1D4EF74538274.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 11, 2025
Raw hash: 88fec3065dae622fa7a73a728f37f64eab042593791f67b22a1367975feca342

Reporting entityWinston & Strawn LLP

Victim entityHertz Corporation (Cleo Communications US LLC)

Incidentdiscovered Feb 10, 2025

Stated responseReported this event to law enforcement

ComplianceIA AG ≤5 bday

Extraction provenanceno artifact recorded

Source provenancewww.iowaattorneygeneral.gov