Data Breaches at MasTec and Palacio, Palacio & Zimmerman Expose Sensitive Information

Data Breaches at MasTec and Palacio, Palacio & Zimmerman Expose Sensitive Information

2h ago •Classaction •71% similarity •64.5
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MasTec reported a data breach affecting 25,220 individuals due to unauthorized access via a zero-day vulnerability in a third-party vendor. The breach exposed sensitive information, including Social Security numbers, prompting class action lawsuit investigations. Affected individuals were notified on June 5, 2026. Separately, accounting firm Palacio, Palacio & Zimmerman disclosed a data breach on June 10, 2026, potentially compromising Social Security numbers, but further details are currently unavailable. Both incidents highlight ongoing vulnerabilities in third-party vendor security and the need for robust data protection measures.

Key Points: • MasTec's breach affects over 25,000 individuals, exposing sensitive personal data. • Palacio, Palacio & Zimmerman's breach may involve compromised Social Security numbers. • Both companies are facing potential class action lawsuits due to the breaches.

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Timeline

2025-10-01
MasTec notified of suspicious activity
MasTec learned of unauthorized access at a third-party vendor, initiating a forensic investigation.
Classaction
2026-02-01
Data review vendor concludes investigation
A review identified compromised sensitive information, including SSNs and financial details.
Classaction
2026-06-05
MasTec notifies affected individuals
Notification letters were sent to 25,220 individuals whose data was compromised in the breach.
Classaction
2026-06-10
Palacio, Palacio & Zimmerman reports data breach
The accounting firm disclosed a breach potentially compromising SSNs, details are limited.
Classaction

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