HackingFinancial ServicesFinanceStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHighContained

KeyBank National Association

bd_bb6a13ba4a407bef · schema v1 · pii pii-v1

Severity

High

Discovered

Dec 14, 2024

Filed

Feb 11, 2025

To disclose

8 weeks

Affected · nationwide

1,22713 in this filing

Linked

2 filings

Confidence

66%

Full breach record for KeyBank National Association →13 incidents on file

KeyBank N.A. reported a third-party vendor breach involving Wong Fleming. An unauthorized external party gained remote access to Wong Fleming's network on Dec 14, 2024, potentially accessing KeyBank client data including SSNs and account numbers. 1,227 individuals affected; 13 in Maine. KeyBank notified the FBI and offered 24 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Dec 14, 2024 → Filed with AG Feb 11, 202559d ⏱ ME AG >30d8 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 1 days

discovery → filing · 8 weeks / 59 days

Dec 13, 2024

Begins

Dec 14, 2024

Discovered

Feb 11, 2025

Filed

vs. sector median

on median

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_7dc6f8c83aa54e3e2025-02-11Candidate

Name: KeyBank National Association
norm: keybank national

Name: KeyBank National Association
norm: keybank national
Industry: Financial Servicesllm

Discovered: Dec 14, 2024
Breach occurred: Dec 13, 2024 – Dec 14, 2024
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Feb 11, 2025
Affected individuals: 1,227state + nationwide
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Filed notice with Maine Attorney General
Third party: via Wong Fleming
Initial access: trusted_relationship

During the incident: Wong Fleming is investigating this incident with the assistance of third-party cybersecurity experts
Deployed enhanced authentication and security monitoring tools across their network
Notified the Federal Bureau of Investigation (FBI) of this incident
Sent written notification to affected individuals
Offered 24 months Equifax Complete Premier credit monitoring and ID theft/restoration services
Changes made: Deployed enhanced authentication and security monitoring tools across their network
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(59 days from discovery to filing)
Compliance flags: ME AG >30d · 59d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Dec 14, 2024
→ Filed with AG: Feb 11, 2025
59d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Dec 14, 2024 → Filed with AG: Feb 11, 2025	59d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGFeb 11 · first

Maine State AGFeb 11 · 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-a1252b4f8318/0df6c342-119d-4fef-97bf-e1a523f8821c.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 11, 2025
Raw hash: 0708d89f73d25bc5846de759a47d4d24aa10a4e102c1955710498718abf21ee5

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityKeyBank National Association

Victim entityKeyBank National Association

Incidentdiscovered Dec 14, 2024

Stated responseWong Fleming is investigating this incident with the assistance of third-party cybersecurity experts

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov