MasTec, Inc. data breach

Clerk's notes

On June 5, 2026, MasTec, Inc., a significant infrastructure construction and engineering firm, officially reported a security incident to the Maine Attorney General's office. This filing confirms that unauthorized access to the company's systems occurred, leading to a potential compromise of stored information.

For individuals who received a direct notification letter from MasTec, Inc., this indicates that your personal information was stored within the company's network at the time of the incident. The purpose of this notice is to inform you about the event and outline steps you can consider to protect your identity and financial security.

The official status of this incident is currently 'investigating.' This means that authorities and MasTec are actively working to understand the full scope of the breach, including the specific details of the unauthorized access and the extent of the information involved.

Given the nature of such incidents, it is prudent for recipients of a notification letter to remain vigilant. We recommend monitoring your accounts for any unusual activity and considering updating passwords for any services that might share credentials. Regularly reviewing credit reports can also help detect potential misuse of your data.

If you have received a notification letter concerning the MasTec, Inc. security incident, you may be wondering about your options. Understanding the potential impact on your personal information and any available recourse is important. Our firm is currently reviewing this case, and we offer a free consultation to help affected individuals understand their situation without obligation.

If a notification letter about this breach reached you, see every Maine data breach on file or browse all cases.