Williamsville State Bank & Trust
bd_1e7739be0af27be3 · schema v1 · pii pii-v2
Full breach record for Williamsville State Bank & Trust →Williamsville State Bank and Trust notified affected individuals on April 21, 2025, regarding a security breach of its cloud-based email platform. Unauthorized access occurred starting around October 16, 2024, when a bad actor leveraged administrator credentials to access employee email accounts. The incident was discovered on December 24, 2024, and security was restored by December 27, 2024. Accessed data included names, account numbers, credit/debit card numbers, SSNs, driver's license numbers, dates of birth, and physical addresses. The bank implemented additional security measures and notified regulatory and law enforcement authorities.
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Incident timeline
Oct 16, 2024
Begins
Dec 24, 2024
Discovered
Apr 21, 2025
Filed
Linked disclosures
Why this link?Regulatory filings (1) · sorted by filing gap
- Illinois State AGbd_41d716e1273156e62025-04-01 · +20dVerified
Filing propagation · 2 filings · 2 states
View merged incident ↗Pattern: first filing Apr 1 (IL), last Apr 21 (NE) — a 20-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.