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investigation open

Updated 16 days ago

AECOM Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving AECOM.
•Discovered on September 17, 2026.
•Possible data exposed: SSN.
•Affects individuals in: Texas.
•Confirmation level: Based on reports.

Detailed summary

Ransomware.live reported on September 17, 2026, that the BrainCipher group claimed an attack against AECOM. The report identified September 17, 2026, as the attack date. A separate report described the incident as an unconfirmed claim involving approximately 1.22 terabytes of data, but AECOM had not publicly confirmed the breach in the sources reviewed.

The affected entity-level number of individuals and the types of personal information involved have not been disclosed. The available reports do not confirm exposure of Social Security numbers, medical information, financial information, or other specific data types. No regulator filing or official breach notification was identified in the sources reviewed.

A class-action law firm published an investigation page concerning the reported incident, but no filed lawsuit, named plaintiff, or multidistrict litigation was identified. Further details may emerge if AECOM or a regulator issues a formal notice.

Data possibly involved

SSN
Can be used to open fraudulent accounts and file false tax returns

Company Response Timeline

Breach Occurred

Sep 17, 2026

Company Discovered

Sep 17, 2026

Regulator Notified

Unknown

Consumers Notified

Unknown

0 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:

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 AECOM?

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

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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