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investigation open

Updated 9 days ago

St. Peter O'Brien Law Offices Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving St. Peter O'Brien Law Offices.
•Discovered on September 8, 2026.
•Possible data exposed: Names.
•Affects individuals in: Montana.
•Confirmation level: Confirmed by company.

Breach confirmed

The St. Peter O'Brien Law Offices breach is confirmed. If you may be affected, add your details below and we will take it from there.

Detailed summary

St. Peter O'Brien Law Offices, a Missoula, Montana law firm, reported unauthorized activity on its computer network during a September 19–23, 2025 access window. The breach was publicly reported in an update dated September 7, 2026, and notifications were sent to affected individuals on April 23, 2026. The firm offered 12 months of complimentary credit monitoring through Cyberscout.

The affected individuals were clients of St. Peter O'Brien Law Offices. The exposed information may have included names of individuals connected to legal matters handled by the firm. The firm has not publicly disclosed an entity-level affected count or confirmed exposure of Social Security numbers, medical information, financial information, or other specific data categories. Further details may emerge as breach notices and related records become available.

Data possibly involved

Names

Company Response Timeline

Response Grade

Notified consumers within 30 days of discovery

Breach Occurred

Sep 19, 2025

Company Discovered

Sep 8, 2026

Regulator Notified

Unknown

Consumers Notified

Apr 23, 2026

354 days to discover

-138 days to notify consumers

Breach Verification Status

Reports Only

Complete

Initial dark web reports of potential breach

Company Confirmed

Current

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:

Investigation Open

We're actively investigating this case and seeking affected individuals.

Were you affected? Submit your information below.

Were You Affected By This Breach?

If you are a customer or have received a data breach notification, you may submit your information as part of our ongoing investigation. Submitting your information is free and does not obligate you.

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Check Your Risk Level

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Do you use St. Peter O'Brien Law Offices?

Yes

What state are you in?

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

Consider a credit freeze

Prevent unauthorized access to your credit report

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