MalwareFinancial ServicesFinanceRansomwareSupply Chain (3P Vendor)Data EncryptedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Bokf, Na

bd_59f5225ae5120361 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 11, 2025

Filed

Nov 26, 2025

To disclose

15 weeks

Affected

Not disclosed

Linked

5 filings

Confidence

65%

Full breach record for Bokf, Na →2 incidents on file

BOKF NA notified Vermont residents of a cybersecurity incident at its vendor, Linedata Services, Inc. Linedata detected malicious encryption of data on August 11, 2025. BOKF determined on October 23, 2025, that client personal information, including names and Social Security numbers, may have been improperly accessed. BOKF is providing one year of credit monitoring and fraud assistance. No misuse of data has been confirmed.

J jump to incidentP pin to compareR raw source

Vermont clock✗ VT AG >45 bday15 weeks discovery → filing

Incident timeline

discovery → filing · 15 weeks / 107 days

Aug 11, 2025

Discovered

Nov 26, 2025

Filed

vs. sector median

+6 wks slower

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

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteshinyhuntersbd_7e750e54857c40c52026-08-22 · +269dVerified by operator

Regulatory filings (3) · sorted by filing gap

Massachusetts State AGbd_f70f9d86382d9a232025-11-25 · +1dVerified
Maine State AGbd_03f3acf704579a0b2025-11-24 · +2dCandidate
Indiana State AGbd_db57d1dcced26a5a2025-11-24 · +2dVerified by operator

Name: Bokf, Na
norm: bokf na
Domain: bokfinancial.com

Name: Bokf, Na
norm: bokf na
Domain: bokfinancial.com
Industry: Financial Servicesllm

Discovered: Aug 11, 2025
Materiality determined: —
Notification sent: Nov 21, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: External
Third party: via Linedata Services, Inc.

During the incident: BOKF is closely monitoring communications with Linedata for updates on its forensic investigation
Linedata is working with relevant law enforcement and cybersecurity experts to address the issue
Providing access to Single Bureau Credit Monitoring services at no charge for 12 months
Providing proactive fraud assistance through Cyberscout
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(107 days from discovery to filing)
Compliance flags: VT AG >45 bday
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Maine State AGNov 24 · first

Indiana State AGNov 24 · first

Massachusetts State AG+1d

Vermont State AG+2d · 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://ago.vermont.gov/document/2025-11-26-bokf-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 26, 2025
Raw hash: 705520a49dcdb53d202eacbd7e082e19936831a4f071582abb015afe9ff50f46

Linked disclosures

Ransomware claims (1)

Regulatory filings (3) · sorted by filing gap

Reporting entityBokf, Na

Victim entityBokf, Na

Incidentdiscovered Aug 11, 2025

Stated responseBOKF is closely monitoring communications with Linedata for updates on its forensic investigation

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov