HackingCustomer Data InvolvedIDENTITY_GOVERNMENTIDENTITY_BASICHighContained
BMO Bank N.A.
bd_224db60eab9ab0ff · schema v1 · pii pii-v1
Full breach record for BMO Bank N.A. →BMO Bank N.A. reported an external system breach (hacking) occurring on May 27, 2023, discovered on August 9, 2023. The incident affected 56,879 individuals, including 35 Maine residents. Acquired data included names and Social Security Numbers. The bank provided written notification on August 31, 2023, and offered one year of credit and identity monitoring through Kroll.
Maine clockDiscovered Aug 9, 2023 → Filed with AG Sep 19, 202341d ⏱ ME AG >30d6 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.
Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed56,879 affectedView incident
Source provenance
- Source URL
- https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/0a95077b-b6ea-4da1-8dd3-5ea2713108c1.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
- Filed at
- Sep 19, 2023
- Raw hash
- 48c4cdc9aff22636b281733ec6c05f2b62a91cb74d3b9e8c0caa07a211b4a14d
Reporting entity
- Name
- BMO Bank N.A.norm: bmo bank na
Victim entity
- Name
- BMO Bank N.A.norm: bmo bank na
Incident
- Discovered
- Aug 9, 2023
- Materiality determined
- —
- Notification sent
- Aug 31, 2023
- Affected individuals
- 56,879
- Data types
- IDENTITY_GOVERNMENTIDENTITY_BASIC
- Attack vector
- Unauthorized Access
- MITRE ATT&CK
- T1190 Exploit Public-Facing Application
- Threat actor
- External
- Regulator citations
- Filed data breach notice with Maine Attorney General
- Initial access
- exploit_public_facing
Compliance
- Time to disclose
- 6 weeks(41 days from discovery to filing)
- Compliance flags
- ME AG >30d · 41d
- Discovery-date grounding
- 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.
- Clock breakdown
Statute Window Elapsed Threshold Status Maine Discovered: Aug 9, 2023→ Filed with AG: Sep 19, 202341d 30 days (soft) ME AG >30d
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.