Nucor Steel Suspends Part of Production after Cyberattack

May 16, 2025

INCIDENT

Nucor Corporation's disclosed a cybersecurity incident on their IT network via an 8-K filing. The largest steel producer in the U.S. temporarily suspended production at multiple locations. though Nucor notes it is in the process of gradually restarting them. No details about the date or type of the attack were provided, so it’s unknown if the incident involved data theft or encryption.

Incident Date

May 14, 2025

Estimated Cost

unknown at this time

Type of Malware

No Malware identified

Threat Source

No threat source identified