Hoyle Tanner Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving Hoyle Tanner.
•Discovered on September 17, 2026.
•Possible data exposed: Contracts and agreements, Commercial proposals, Invoices, Customer database, HR records, W-9 tax forms, ACH and banking documents.
•Confirmation level: Based on reports.

Detailed summary

On September 17, 2026, RansomLook recorded a report attributed to the Brain Cipher ransomware group naming hoyletanner.com as a victim. The report identified 33,500 files and described the contents as including contracts and agreements, commercial proposals, invoices, a customer database, human-resources records, W-9 tax forms, and ACH or banking documents. The company has not publicly confirmed the report in the sources reviewed.

The reported files may include financial information, but the entity-level number of affected individuals, any exposure of Social Security numbers, medical information, and the specific breach date remain unknown. No official consumer notice, regulator filing, or lawsuit was identified in the reviewed sources. Further details may emerge if the company or a regulator publishes a formal breach notice.

Data possibly involved

Contracts and agreements
Commercial proposals
Invoices
Customer database
HR records
W-9 tax forms
ACH and banking documents

Breach Verification Status

Reports Only

Current

Initial dark web reports of potential breach

Company Confirmed

Company has acknowledged the breach

Regulator Confirmed

Confirmed by regulatory authorities

Note: Breach verification can take time. Information may evolve as more details become available from companies and regulators.

Case Status:

Monitoring

We're monitoring this situation for developments.

Were You Affected By This Breach?

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Do you use Hoyle Tanner?

Yes

What should I do?

Change your passwords

Update passwords for the affected service and any accounts using the same password

Enable two-factor authentication

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Monitor your accounts

Watch for suspicious activity on your financial and online accounts

Watch for phishing attempts

Be cautious of emails or messages claiming to be from the affected company

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