Mizuno USA Data Breach: Hackers Had Access for Two Months

Mizuno USA, a subsidiary of the Mizuno Corporation and one of the world’s leading sporting goods manufacturers, recently confirmed a data breach that saw unknown attackers gain unauthorized access to its network for over two months. The company revealed in data breach notification letters that sensitive files were stolen from its systems between August and October 2024.

Mizuno USA, headquartered in Peachtree Corners, Georgia, specializes in manufacturing and distributing sports equipment and apparel across North America. The company produces gear for sports including golf, baseball, volleyball, softball, swimming, and tennis.

The breach was discovered on November 6, 2024, when Mizuno detected suspicious activity within its internal network. A subsequent investigation determined that cybercriminals had accessed certain systems and exfiltrated documents containing personal data from August 21, 2024, to October 29, 2024. This unauthorized access allowed hackers to periodically copy files without detection.

Mizuno USA worked swiftly to assess the scope of the breach. By December 18, 2024, a detailed review of the stolen files was completed…