HackingStolen CredentialsCustomer Data InvolvedIDENTITY_BASICIDENTITY_GOVERNMENTFINANCIALMediumContained
Topstep Brokerage
bd_feda97c361d06998 · schema v1 · pii pii-v1
Full breach record for Topstep Brokerage →Topstep LLC reported a cybersecurity incident on December 14, 2025, involving credential stuffing attacks using stolen credentials from external sources. The attack may have granted unauthorized access to user accounts containing PII, including names, DOBs, government IDs, and SSNs. Topstep blocked malicious IPs, forced password resets, and is offering credit monitoring. The incident is currently contained.
Vermont clock⏱ VT AG >14 bday5 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.
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_d103e7440b81fd37Indiana State AGfiled 2026-01-20(4d gap)Verified
- bd_e1bd3f7d6444d49fIndiana State AGfiled 2026-01-20(4d gap)Verified
- bd_1ba3a5d6f8186b38New Hampshire State AGfiled 2026-01-05(11d gap)Verified
- bd_865cfabcd1482f64Indiana State AGfiled 2025-12-30(17d gap)Verified
Show 4 more filings ↓Show fewer ↑up to 27d gap
- bd_0a892e5fb23ecfefIndiana State AGfiled 2025-12-22(25d gap)Verified
- bd_204febfe40a8a423New Hampshire State AGfiled 2025-12-22(25d gap)Verified
- bd_ac7762ff013459daMaine State AGfiled 2025-12-22(25d gap)Candidate
- bd_f926e2f8532bba86Indiana State AGfiled 2025-12-20(27d gap)Verified
Source provenance
- Source URL
- https://ago.vermont.gov/document/2026-01-16-topstep-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
- Filed at
- Jan 16, 2026
- Raw hash
- 7bdcbdb6a1db3a3c6321517b5b7c5c861e7f4620445cbb26a6f8fb856ca50516
Reporting entity
- Name
- Topstep Brokeragenorm: topstep brokerage
- Domain
- topstepbrokerage.com
Victim entity
- Name
- Topstep Brokeragenorm: topstep brokerage
- Domain
- topstepbrokerage.com
Incident
- Discovered
- Dec 15, 2025
- Materiality determined
- —
- Notification sent
- —
- Affected individuals
- Not disclosed
- Data types
- IDENTITY_BASICIDENTITY_GOVERNMENTFINANCIAL
- Attack vector
- Phishing
- MITRE ATT&CK
- T1110.003 Credential StuffingT1078 Valid Accounts
- Threat actor
- ExternalFinancial
- Initial access
- valid_credentials
Compliance
- Time to disclose
- 5 weeks(32 days from discovery to filing)
- Compliance flags
- VT AG >14 bday
- 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.
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.