AccidentalFinancial ServicesFinanceMisdeliveryCustomer Data InvolvedIdentity (basic)Financial accountMediumContained

Quad City Bank And Trust Company

bd_7ea5f3671ef563b9 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 27, 2025

Filed

Jun 26, 2025

To disclose

4 weeks

Affected

9,535state residents only

Linked

3 filings

Confidence

66%

Full breach record for Quad City Bank And Trust Company →

Quad City Bank and Trust Company notified Iowa AG of a data security incident on May 27, 2025. An electronic file formatting error during a routine data exchange with banking partners exposed contact info and account numbers for ~9,535 Iowa residents. No SSNs or login credentials were involved. Notices were sent June 25, 2025.

J jump to incidentP pin to compareR raw source

Iowa clock✓ IA AG ≤5 bday4 weeks discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 4 weeks / 30 days

May 27, 2025

Begins

May 27, 2025

Discovered

Jun 26, 2025

Filed

vs. sector median

4 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_28adfe1892b273672025-07-03 · +7dVerified
Illinois State AGbd_3a425eb4dffdf43f2025-06-01 · +25dVerified

Name: Quad City Bank And Trust Company
norm: quad city bank and

Name: Quad City Bank And Trust Company
norm: quad city bank and
Industry: Financial Servicesllm

Discovered: May 27, 2025
Breach occurred: May 27, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 25, 2025
Affected individuals: 9,535state-resident count only
Data types: Identity (basic)Financial account
Attack vector: Misconfiguration
MITRE ATT&CK: T1119 Automated Collection

During the incident: Working with business partners to review file transmission processes
Ensuring appropriate file format validation is performed prior to client delivery
Provided customers with information about credit monitoring, fraud prevention and detection services, and identify theft resources
Changes made: Reviewing file transmission processes
Implementing appropriate file format validation prior to client delivery
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 4 weeks(30 days from discovery to filing)
Compliance flags: IA AG ≤5 bday
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Illinois State AGJun 1 · first

Iowa State AG+25d · this page

Massachusetts State AG+32d

Pattern: first filing Jun 1 (IL), last Jul 3 (MA) — a 32-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/6262025_Quad_City_Bank_and_Trust_Co_416028DA43A88.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 26, 2025
Raw hash: 50980dce8dd203540d0ba1d098012f0a3630bb5a3507363354601bdf158791b0

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityQuad City Bank And Trust Company

Victim entityQuad City Bank And Trust Company

Incidentdiscovered May 27, 2025

Stated responseWorking with business partners to review file transmission processes

ComplianceIA AG ≤5 bday

Extraction provenanceno artifact recorded

Source provenancewww.iowaattorneygeneral.gov