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Cybersecurity incident forces largest US steelmaker to take some operations offline

ID: 58fe17f3-386b-52f8-b900-cb4c5c758155

STIX ID: report--58fe17f3-386b-52f8-b900-cb4c5c758155

Feed Name: The Record from Recorded Future News

Threat Score
50/100

Date Published: 2025-05-14

Date Updated: 2026-05-01

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Nucor, a large U.S. steelmaker, reported unauthorized third-party access to certain IT systems and temporarily halted production at some facilities as a precaution while activating its incident response and containment measures; the filing gives few technical details, affected locations, or attribution.

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