HackingStolen CredentialsCustomer Data InvolvedDelayed DiscoveryIDENTITY_BASICIDENTITY_GOVERNMENTMediumContained
Topstep Brokerage
bd_1ba3a5d6f8186b38 · schema v1 · pii pii-v1
Full breach record for Topstep Brokerage →Topstep LLC notified the New Hampshire Attorney General of a security incident involving password stuffing. Between September 8 and October 16, 2025, unauthorized access occurred, potentially exposing names and Social Security numbers of one New Hampshire resident. Topstep discovered the breach on December 3, 2025, engaged cybersecurity experts, and began notifying affected individuals on December 30, 2025, offering credit monitoring services.
This filing is one of 9 about the same incident.View merged incident
Linked disclosures
Why this link?Regulatory filings (8) · sorted by filing gap
- bd_865cfabcd1482f64Indiana State AGfiled 2025-12-30(6d gap)Verified
- bd_feda97c361d06998Vermont State AGfiled 2026-01-16(11d gap)Verified
- bd_0a892e5fb23ecfefIndiana State AGfiled 2025-12-22(14d gap)Verified
- bd_204febfe40a8a423New Hampshire State AGfiled 2025-12-22(14d gap)Verified
Show 4 more filings ↓Show fewer ↑up to 16d gap
- bd_ac7762ff013459daMaine State AGfiled 2025-12-22(14d gap)Candidate
- bd_d103e7440b81fd37Indiana State AGfiled 2026-01-20(15d gap)Verified
- bd_e1bd3f7d6444d49fIndiana State AGfiled 2026-01-20(15d gap)Verified
- bd_f926e2f8532bba86Indiana State AGfiled 2025-12-20(16d gap)Verified
Source provenance
- Source URL
- https://mm.nh.gov/files/uploads/doj/remote-docs/topstep-20260105.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
- Filed at
- Jan 5, 2026
- Raw hash
- 7042d9abae81a0137ed80ae67277411749578b0cbd6012c7cd4d40794aeead85
Reporting entity
- Name
- McDonaldnorm: mcdonald
- Domain
- mcdonalds-menus.us
Victim entity
- Name
- Topstep Brokeragenorm: topstep brokerage
- Domain
- topstepbrokerage.com
Incident
- Discovered
- Dec 3, 2025
- Materiality determined
- —
- Notification sent
- Dec 30, 2025
- Affected individuals
- 1
- Data types
- IDENTITY_BASICIDENTITY_GOVERNMENT
- Attack vector
- Unauthorized Access
- MITRE ATT&CK
- T1110 Brute ForceT1119 Automated Collection
- Threat actor
- External
- Regulator citations
- Notified New Hampshire Office of the Attorney General
- Initial access
- valid_credentials
Compliance
- Time to disclose
- 5 weeks(33 days from discovery to filing)
- Compliance flags
- — (clock not assessable for this source)
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.