Optima Tax Relief
Disclosed Jun 6, 20251 year ago19,732 affectedConfirmed
Chaos ransomware gang leaks Optima Tax Relief case files
The Chaos ransomware gang listed Optima Tax Relief on its leak site and claimed to have stolen 69 GB of corporate data and customer case files.
What is known
| People affected | 19,732 (as reported by the organization) |
|---|---|
| Disclosed | Jun 6, 2025 |
| Discovered | Oct 10, 2025 |
| Happened | May 1, 2025 |
| Attack | Ransomware |
| Data exposed | Internal documents, Other, Social Security numbers, Health, Insurance, Payment cards, Financial, Names |
| Sector | Finance · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Optima Tax Reliefoag.ca.gov · Official notice | Official notice |
| Tax resolution firm Optima Tax Relief hit by ransomware, data leakedbleepingcomputer.com · News | News |
| Texas Attorney General data security breach report BR-0004675: Optima Tax Reliefoag.my.site.com · Official notice | Official notice |
| Vermont Attorney General: 2025-10-20 Optima Tax Relief Data Breach Notice to Consumersago.vermont.gov · Official notice | Official notice |
| Indiana Attorney General 2025 data breach report: Optima Tax Reliefin.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| Researchtotal | Jun 6, 2025 | |
| California AGresidents of CA | Aug 15, 2025 | |
| Indiana AGresidents of IN | Aug 15, 2025 | 296 |
| Vermont AGresidents of VT | Oct 20, 2025 | |
| California AGresidents of CA | Nov 18, 2025 | |
| Texas AGresidents of TX | Nov 19, 2025 | 2,351 |
Other breaches at Optima Tax Relief
| Breach | Affected | ||||
|---|---|---|---|---|---|
| Disclosed May 2, 2023May 2, 20233 years ago | May 2, 20233 years ago | Not stated | Finance | Confirmed | 5,027 |
History of this record
- 2026-09-25 · source: empty to https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/files/DB-Year-to-Date-Report-2025.pdf · backfill source
- 2026-09-25 · source: empty to https://ago.vermont.gov/document/2025-10-20-optima-tax-relief-data-breach-notice-consumers · backfill source
- 2026-09-25 · data_types: ["internal-docs","other"] to ["internal-docs","other","ssn","health","insurance","payment-card","financial","names"] · backfill source
- 2026-09-25 · records_basis: empty to organization · backfill source
- 2026-09-25 · records: empty to 19732 · backfill source
- 2026-09-25 · discovered: empty to 2025-10-10 · backfill source
- 2026-09-25 · attack: unknown to ransomware · seed source
- 2026-09-25 · data_types: [] to ["internal-docs","other"] · seed source
- 2026-09-25 · disclosed: 2025-08-15 to 2025-06-06 · seed source
- 2026-09-25 · summary: empty to The Chaos ransomware gang listed Optima Tax Relief on its leak site and claimed to have stolen 69 GB of corporate data and customer case files. · seed source
- 2026-09-25 · title: empty to Chaos ransomware gang leaks Optima Tax Relief case files · seed source
- 2026-09-25 · disclosed: 2025-11-18 to 2025-08-15 · backfill source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.