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Check Your Eligibility

MasTec Data Breach

MasTec, Inc. reported a data breach affecting 25,220 individuals, including 11 Maine residents, after hackers accessed part of their network. Learn about the breach and protective measures.

Check Your Eligibility
MasTec
Date of Breach: October 29, 2025
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Who was affected:

Clients of MasTec

Impacted Data:

Names

Social Security numbers

Addresses

Dates of birth

Case numbers

Check Your Eligibility

MasTec, Inc., a construction and infrastructure company, recently disclosed a cybersecurity incident affecting 25,220 individuals, including 11 Maine residents. The breach involved unauthorized access to a portion of the company’s network and may have exposed personal information for impacted individuals.

MasTec, Inc.’s Data Breach Investigation

In early October 2025, MasTec received reports of suspicious activity in a small portion of its computer network. The company immediately engaged third-party cybersecurity experts to investigate the activity. The investigation revealed that an unauthorized third party had gained access to the network for several days in August 2025. A data-review firm analyzed the impacted files to identify the personal information involved and the individuals affected .

MasTec has taken steps to remediate the incident, including securing systems, notifying law enforcement, and implementing additional technical safeguards to protect against future breaches. Notification letters to affected individuals were sent to ensure they were informed of the incident and available protective measures .

Affected individuals are offered complimentary identity-theft protection services through MasTec’s Financial Shield program. These services include credit monitoring, fraud alerts, and guidance on protecting personal information.

When Did This Breach Occur?

The breach occurred between August 9, 2025, and was discovered in early October 2025. Notifications to affected individuals were sent on May 11, 2026 .

What Information Was Breached?

The personal information potentially exposed may include:

  • Names
  • Other personal identifiers associated with the affected files

The exact scope of the exposure may vary by individual .

What You Can Do

Enroll in the complimentary Financial Shield identity-theft protection and credit monitoring services offered by MasTec. Monitor financial accounts and credit reports for suspicious activity.

Consider placing a fraud alert or security freeze with Equifax, Experian, and TransUnion to prevent unauthorized accounts from being opened in your name. Regularly review financial statements and credit reports for any discrepancies, and report suspected fraud to law enforcement, the FTC, and your state Attorney General .

File a Data Breach Lawsuit Against MasTec, Inc.

If you received notice from MasTec indicating your information may have been exposed, you may be eligible to join a class action lawsuit.

Class action lawsuits allow individuals affected by data breaches to seek compensation for identity theft risks, financial losses, out-of-pocket expenses, and time spent addressing the breach. Legal action can also encourage stronger cybersecurity protections to prevent future incidents.

Contact us at Class Action U, where we’ll connect you with a lawyer skilled in class action lawsuits. If you’ve been contacted about this breach, received notice, or discovered you were impacted, fill out our quick, easy, and secure form to sign up. There is no cost to reach out to our legal partner and no obligation after speaking with someone from our team.

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Frequently Asked Questions

A data breach occurs when sensitive, confidential, or protected information is accessed, stolen, or disclosed without authorization. Data breaches often occur through phishing emails, malware, weak passwords, insider threats, or unsecured databases. Indicators of a data breach can include unexpected password resets, suspicious account activity, unauthorized transactions, or notifications from companies about compromised information.If you suspect your data has been compromised, you must take measures and act quickly. Change passwords, enable two-factor authentication, review your financial accounts for unusual activity and consider freezing your credit.

Once stolen, your personal information may be sold on the dark web or used for identity theft and financial fraud. In some cases, hackers use the data to extort companies or launch further attacks. Victims often face long-term risks, including damage to credit and privacy.

If you receive a data breach notification, don’t ignore it. Immediately change passwords for the affected account and any others that share credentials. Enroll in any free credit monitoring services offered and monitor financial statements closely.

To pursue a data breach claim, you’ll need documentation showing your information was compromised and proof of resulting harm, such as fraudulent charges, credit score damage, or identity theft reports. Notification letters, financial records, and communication with the breached company can help support your claim.

Yes. If a company fails to protect consumer data or delays notifying victims, it may be held liable under state and federal privacy laws. Many victims join class action lawsuits to recover financial losses and hold negligent organizations accountable.

Data breach settlements vary widely depending on the size of the breach, type of data compromised, and damages suffered by victims. Payouts may include cash compensation, identity theft protection, or reimbursement for losses. Many settlements range from a few hundred to several thousand dollars per person. A skilled data breach lawyer can guide victims through the complex legal process, ensuring their rights are protected. If you’ve received a data breach notification or believe your personal data was exposed, you may be eligible for compensation. Contact Class Action U to learn more about how to join a data breach lawsuit and understand the process of filing.