M&T BANK CORPORATION
bd_68944179c68ed138 · schema v1 · pii pii-v1
Full breach record for M&T BANK CORPORATION →13 incidents on fileM&T Bank reported that an external system breach (hacking) on May 27, 2023, resulted in the compromise of personal information for 43 Maine residents. The breach was discovered on June 1, 2023. The compromised data includes names and Social Security Numbers. Affected individuals were notified on January 26, 2024, and have been offered 24 months of identity and credit monitoring services through Kroll. The consumer notice attached to the filing is from 'Delta Dental of California and affiliates,' which may indicate the breach originated with a third-party vendor.
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Incident timeline
May 27, 2023
Begins
Jun 1, 2023
Discovered
Jan 25, 2024
Filed
vs. sector median
+25 wks slower
Linked disclosures
Why this link?Regulatory filings (1) · sorted by filing gap
- Massachusetts State AGbd_843f36f7229da2352024-01-25Verified
Filing propagation · 2 filings · 2 states
View merged incident ↗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.