HackingRetail & ConsumerRetailStolen CredentialsSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDMediumContained

WK KELLOGG CO

bd_33282fd020487c03 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 27, 2025

Filed

Apr 4, 2025

To disclose

5 weeks

Affected

1state residents only

Linked

5 records

Confidence

66%

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

WK Kellogg Co. reported a third-party breach involving vendor Cleo, a secure file transfer provider. An unauthorized person gained access to Cleo's servers on December 7, 2024. WK Kellogg discovered the incident on February 27, 2025. The breach affected one Maine resident, whose name and Social Security Number were exposed. Notification was sent on April 4, 2025, including one year of credit monitoring.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Feb 27, 2025 → Filed with AG Apr 4, 202536d ⏱ ME AG >30d5 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 · 82 days

discovery → filing · 5 weeks / 36 days

Dec 7, 2024

Begins

Feb 27, 2025

Discovered

Apr 4, 2025

Filed

vs. sector median

4 wks faster

This filing is one of 5 records about the same incident.View merged incident

Part of Cleo supply-chain incident (2025) — a supply-chain cascade affecting multiple organizations.View cascade →

A leak claim by cl0p about this victim was first seen 36 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitecl0pbd_6d36243d4b4a9ca62025-02-27 · +36dVerified

Regulatory filings (3) · sorted by filing gap

Indiana State AGbd_5274f974c8dcc3832025-04-04Verified
New Hampshire State AGbd_8aaba010cf1da3a82025-04-04Verified
Massachusetts State AGbd_faf7ac7456a8c7132025-04-04Verified by operator

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: 1state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1078 Valid Accounts
Threat actor: External
Regulator citations: Filed notification with Maine Attorney General
Initial access: supply_chain

During the incident: Began to investigate
Contacted Cleo
Established a dedicated, toll-free call center to answer questions
Offered one year of complimentary credit monitoring and identity protection services through Kroll
Changes made: Worked with Cleo to identify the measures it has taken to address this incident
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(36 days from discovery to filing)
Compliance flags: ME AG >30d · 36dLeak >30d
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.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Feb 27, 2025
→ Filed with AG: Apr 4, 2025
36d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Feb 27, 2025 → Filed with AG: Apr 4, 2025	36d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Indiana State AGApr 4 · first

New Hampshire State AGApr 4 · first

Massachusetts State AGApr 4 · first

Maine State AGApr 4 · first · this page

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.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/9b6116f8-043e-40c5-a210-c152d4edfa95.html
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: 33a86202cfcd999d10d72eb3740ecd6610394346cb62ac167a7342a92593ed68

Linked disclosures

Ransomware claims (1)

Regulatory filings (3) · sorted by filing gap

Reporting entityWK KELLOGG CO

Victim entityWK KELLOGG CO

Incidentdiscovered Feb 27, 2025

Stated responseBegan to investigate

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov