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Customer, Employee Data Exposed in Nippon Steel Breach

ID: 6afdea24-4f4d-521e-8778-38371db51bdf

STIX ID: report--6afdea24-4f4d-521e-8778-38371db51bdf

Feed Name: Dark Reading

Threat Score
70/100

Date Published: 2025-07-11

Date Updated: 2026-04-21

Author: Kristina Beek

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Nippon Steel Solutions disclosed a data breach caused by exploitation of a zero-day flaw in network equipment, resulting in unauthorized access to customers', partners', and employees' information; the firm has isolated compromised devices, restricted external network access, and is investigating the scope and cause. While no stolen data has been found on the dark web yet, the BianLian ransomware group is mentioned as a possible but unconfirmed actor.

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