HackingRetail & ConsumerRetailData MishandlingSupply Chain (3P Vendor)Customer Data InvolvedGovernment IDIdentity (basic)MediumContained

WK KELLOGG CO

bd_d8f1d50fcd43251f · schema v1 · pii pii-v2

Severity

Medium

Discovered

Feb 27, 2025

Filed

Apr 4, 2025

To disclose

—

Affected

638state residents only

Confidence

65%

Full breach record for WK KELLOGG CO →2 incidents on file

WK Kellogg Co. notified Nebraska AG that vendor Cleo experienced unauthorized access on Dec 7, 2024, exposing names and SSNs of 638 Nebraska residents. WK Kellogg discovered the incident on Feb 27, 2025, began mailing notifications on Apr 4, 2025, and offered one year of credit monitoring.

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Incident timeline

undetected · 82 days

Dec 7, 2024

Begins

Feb 27, 2025

Discovered

Apr 4, 2025

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed638 affectedView incident

Name: WK KELLOGG CO
norm: wk kellogg
Domain: wkkellogg.com

Name: WK KELLOGG CO
norm: wk kellogg
Domain: wkkellogg.com
Industry: Retail & Consumerllm

Discovered: Feb 27, 2025
Breach occurred: Dec 7, 2024
Undetected for: 82 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 4, 2025
Affected individuals: 638state-resident count only
Data types: Government IDIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: External
Initial access: supply_chain

During the incident: Began to investigate
Contacted Cleo
Offering all notified individuals one year of complimentary credit monitoring and identity protection services
Established a dedicated, toll-free call center to answer questions
Changes made: Requires vendors, including Cleo, to use appropriate security measures
Worked with Cleo to identify the measures it has taken to address this incident
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

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://nebraska.gov/ago/data-breach/documents/687b9cc8-95f8-4d7d-a7da-99ed9e10b86a.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 4, 2025
Raw hash: 0514d48a969a3f915504dea52eb5c41e811aab639e86a01742e120e8d14546ca

Reporting entityWK KELLOGG CO

Victim entityWK KELLOGG CO

Incidentdiscovered Feb 27, 2025

Stated responseBegan to investigate

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov