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Updated about 1 month ago

Siena Construction Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving Siena Construction.
•Discovered on April 3, 2026.
•Possible data exposed: QBOOK data, Project Records, Employee Information, Finance Records, Technical Data, Suppliers Information, Bid Documents.
•Confirmation level: Based on reports.

Detailed summary

Siena Construction, a US-based company, experienced a data breach in March 2026, which was discovered on April 3, 2026. The nightspire ransomware group is reportedly responsible for this incident. This information comes from reports by security researchers.

The breach involved various types of data, including QBOOK data, project records, employee information, finance records, technical data, suppliers information, and bid documents. The exact number of affected individuals and specific US states impacted by this breach remain unclear at this time. There is no publicly available information regarding official breach notifications from Siena Construction or any class action lawsuits.

Details about data breaches can emerge over time, and official notifications to consumers may be delayed.

Data possibly involved

QBOOK data
Project Records
Employee Information
Finance Records
Technical Data
Suppliers Information
Bid Documents

Company Response Timeline

Breach Occurred

Mar 29, 2026

Company Discovered

Apr 3, 2026

Regulator Notified

Unknown

Consumers Notified

Unknown

5 days to discover

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?

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 Siena Construction?

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

Add an extra layer of security to your accounts

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

Scan your email for other exposures

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