US EditionSteelmaker Nucor halts some production after cyber security incident
- Nucor Corporation, a leading U.S. Steel producer, suspended certain production activities following a cybersecurity breach revealed on May 14, 2025.
- The shutdown followed unauthorized access to parts of Nucor's IT systems, prompting the company to take affected systems offline and implement containment measures.
- Nucor, headquartered in Charlotte, North Carolina, operates over 20 steel mills and more than 70 metals recycling centers across North America and notified federal law enforcement and cybersecurity experts.
- The company described the attack as targeting "certain information technology systems," and it is currently progressing with the gradual restart of affected operations without specifying a full resumption timeline.
- This incident highlights ongoing risks to U.S. Critical infrastructure, as manufacturing faces frequent ransomware threats causing costly operational disruptions and supply chain effects.
14 Articles
14 Articles
Steelmaker Nucor experiences cybersecurity incident, shuts down some production
Steelmaker Nucor said on Wednesday that it had experienced a cybersecurity incident and temporarily shut down some of its production operations as a precaution.The North Carolina-based company said it discovered "unauthorized third party access to certain information technology systems" that it uses.Nucor did not specify which production operations had been "temporarily and proactively" shut down in a regulatory filing but said it was currently …
Steelmaker Nucor halts some production after cyber security incident
Steelmaker Nucor said on Wednesday it had halted certain production at various locations after identifying a cyber security incident that involved unauthorized third-party access to certain information technology systems it used.The Charlotte, North Carolina-based company said it is in the process of restarti
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