Nucor

2 breaches11K affected in allManufacturingnucor.com

Cyberattack forces steelmaker Nucor to halt some productionCyberattack forces steelmaker Nucor to halt some productionHacking2,461 affectedManufacturingUSMay 14, 2025 Breach, details not statedBreach notice filed with the Indiana AG, details not stated.8,824 affectedManufacturingUSJun 30, 2023

About

Every breach here links to its sources and official notices. Across Glyph: lawsuits, incidents and outages, the company profile.

records_basis2026-09-25

Nucor, 2023-06-30organization

records2026-09-25

Nucor, 2023-06-308824

occurred2026-09-25

Nucor, 2023-06-302023-05-26

records_basis2026-09-25

Nucor, 2025-05-14organization

records2026-09-25

Nucor, 2025-05-142461

occurred2026-09-25

Nucor, 2025-05-142025-05-03

Added2026-09-25

Nucor, 2023-06-30

source2026-09-25

Nucor, 2025-05-14https://ago.vermont.gov/document/2025-06-24-nucor-corporation-data-breach-notice-consumers

sector2026-09-25

Nucor, 2025-05-14manufacturing

attack2026-09-25

Nucor, 2025-05-14hacking

summary2026-09-25

Nucor, 2025-05-14Nucor told the SEC it identified unauthorized third-party access to some IT systems and temporarily halted production at various locations as a precaution.

title2026-09-25

Nucor, 2025-05-14Cyberattack forces steelmaker Nucor to halt some production

domain2026-09-25

Nucornucor.com

disclosed2026-09-25

Nucor, 2025-05-142025-05-14

Added2026-09-25

Nucor, 2025-05-14

Added2026-09-25

Nucor