St. Mary's Credit Union
bd_790b1bf932b33b9c · schema v1 · pii pii-v1
Full breach record for St. Mary's Credit Union →420 incidents on fileSt. Mary’s Credit Union notified Massachusetts members of a security incident involving Mastercard where their debit/ATM cards may have been compromised, potentially allowing unauthorized access to funds. The Credit Union lowered daily transaction limits, deactivated the affected cards, and issued new cards to members. No specific count of affected individuals was disclosed in this notification.
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Incident timeline — partial
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Breach window unknown
May 7, 2026
Filed
No interval is drawn: no breach start or discovery date is on record for this filing.
Linked disclosures
Why this link?Regulatory filings (7) · sorted by filing gap
- Massachusetts State AGbd_8b3f2ebc4f214c8a2026-06-09 · +33dCandidate
- Massachusetts State AGbd_97514116f376b7ec2026-06-10 · +34dCandidate
- Massachusetts State AGbd_7fdfa5a4a73c29b12026-06-11 · +35dCandidate
- Massachusetts State AGbd_4ed87e64ac3bd1f82026-07-09 · +63dCandidate
Show 3 more filings ↓Show fewer ↑up to 77d gap
- Massachusetts State AGbd_9f76c8801e9b61ff2026-07-16 · +70dCandidate
- Massachusetts State AGbd_8077307e22ef9eac2026-07-21 · +75dCandidate
- Massachusetts State AGbd_e6fe8f857139afc62026-07-23 · +77dCandidate
Filing propagation · 8 filings
View merged incident ↗Pattern: first filing May 7 (MA), last Jul 23 (MA) — a 77-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.