DisclosureLens
HackingFinancial ServicesFinanceVulnerability ExploitData ExfiltratedTargetedIdentity (basic)Government IDFinancial accountMediumContained

Western Alliance Bank

bd_31bf2692dfc20e2e · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jan 27, 2025

Filed

Mar 14, 2025

To disclose

7 weeks

Affected

35state residents only

Linked

12 records

Confidence

65%
Full breach record for Western Alliance Bank →

Western Alliance Bank notified individuals of a data breach involving a third-party vendor's secure file transfer software. An unauthorized actor exploited an unknown vulnerability between October 12 and 24, 2024, to access systems and exfiltrate files containing names, SSNs, and financial data. The bank discovered the incident on January 27, 2025, notified law enforcement, and is offering one year of credit monitoring.

Leak gap clock⏱ Leak >30d7 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 · 107 days
discovery → filing · 7 weeks / 46 days

Oct 12, 2024

Begins

Jan 27, 2025

Discovered

Mar 14, 2025

Filed

vs. sector median

2 wks faster

This filing is one of 12 records about the same incident.View merged incident
A leak claim by cl0p about this victim was first seen 49 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Show 6 more filings ↓up to 109d gap

Showing first 10 of 11 linked disclosures.

Filing propagation · 11 filings · 10 states

View merged incident ↗
California State AGMar 14 · first
Nebraska State AGMar 14 · first
Maryland State AGMar 14 · first
Massachusetts State AGMar 14 · first
Maine State AGMar 14 · first
New Hampshire State AGMar 14 · first
Montana State AGMar 14 · first · this page
Washington State AG+108d
Oregon State AG+108d
New Hampshire State AG+108d
Texas State AG+109d

Pattern: first filing Mar 14 (CA), last Jul 1 (TX) — a 109-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 11 — the full spread may be wider.

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.