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Nucor Corporation

Nucor Corporation Vendor Cyber Rating & Cyber Score

Nucor.com

Nucor Corporation and its affiliates manufacture steel and steel products at more than 300 operating facilities primarily in North America. Nucor is the largest steel producer in the United States, operating 26 circular-based steel mills that have an annual production capacity of more than 27,000,000 tons. Nucor is also North America's largest recycler, processing approximately 20 million tons of ferrous scrap annually to produce new steel that is 100% recyclable at the end of its useful life. Nucor’s headquarters are located in Charlotte, North Carolina, and the company employs more than 31,000 teammates.


Nucor Corporation A.I CyberSecurity Scoring

Nucor Corporation
Company Information
Website:https://www.Nucor.com
Employees number:8,527
Number of followers:155,775
NAICS:30
Industry Type:Manufacturing
Homepage:Nucor.com
Nucor Corporation Risk Score (AI oriented)
Between 700 and 749
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Nucor CorporationManufacturing
Updated:
19/06/2026
714/1000
Moderate
Ba
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Nucor Corporation Global Score (TPRM)
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Nucor CorporationManufacturing
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Nucor Corporation
Nucor CorporationModerate
Current Score
714Ba (MODERATE)
01000
5 incidents
-13 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
JULY 2026
711Before Incident
JUNE 2026
711Before Incident
MAY 2026
710Before Incident
APRIL 2026
693Before Incident
MARCH 2026
717Before Incident
Cyber Attack
28 Mar 2026Nucor Corporation
Hasbro and Nucor: Hasbro takes some systems offline after cybersecurity incident

Hasbro Cyberattack Disrupting Operations and Shipments

705After Incident
CRITICAL-12
NUCHAS1775060645
Hasbro Discloses Cyberattack Disrupting Operations and Shipments Toy and entertainment giant Hasbro revealed in a Securities and Exchange Commission (SEC) filing on Wednesday that a cyberattack has disrupted its ability to process orders and ship products. The company’s IT team detected unauthorized access on March 28, prompting immediate containment efforts, including taking some systems offline. Hasbro has activated business continuity plans to maintain key operations while addressing the incident, though delays are expected to persist for several weeks. The company is also reviewing potentially impacted files to determine whether regulatory notifications are required. No hacking group has claimed responsibility as of Monday, and an investigation remains ongoing. The attack adds Hasbro to a growing list of companies including Nucor, Masimo, and Clorox that have reported operational disruptions following cyber incidents in recent months. With $4.7 billion in 2025 revenue, Hasbro ranks among the largest toy and intellectual property manufacturers globally. The sector has seen prior ransomware attacks, with companies like Jakks Pacific and Bandai Namco targeted in previous years.
INCIDENT DETAILS -
TYPE
Cyberattack
IMPACT
Systems Affected: Order processing and shipment systemsDowntime: Several weeksOperational Impact: Disrupted ability to process orders and ship products
FEBRUARY 2026
715Before Incident
JANUARY 2026
712Before Incident
Cyber Attack
13 Jan 2026Nucor Corporation
Aflac, Jaguar Land Rover and Nucor: Major automaker hit by cyberattack, says incident 'severely disrupted' operations

Jaguar Land Rover Ransomware Attack

698After Incident
CRITICAL-14
AFLJAGNUC1768389868
Ransomware Attack Disrupts Jaguar Land Rover Operations as Cyber Threats Surge Across Industries Jaguar Land Rover (JLR), the UK-based automaker owned by India’s Tata Motors, confirmed a ransomware attack that severely disrupted its retail and production operations. In a statement released Tuesday, the company revealed it had taken immediate action to contain the incident by proactively shutting down systems. While JLR reported no evidence of customer data theft, it is working to restore global applications in a controlled manner. The attack is part of a broader wave of cyber incidents targeting critical industries. U.S. steelmaker Nucor also recently experienced a cybersecurity breach, forcing a shutdown of some production lines. The insurance sector has been particularly hard hit, with Aflac, Philadelphia Insurance Companies, and Erie Insurance all falling victim to attacks this summer. Grocery supply chains have not been spared United Natural Foods Inc. (UNFI), a distributor for Whole Foods and other retailers, disclosed a cyber incident in July that temporarily disrupted operations. Meanwhile, the FBI issued a warning last month about the cybercriminal group "Scattered Spider," which has been targeting airlines. Hawaiian Airlines confirmed a June cybersecurity event affecting its IT systems, while Air France and KLM reported a data breach in their customer service platform. The surge in attacks underscores the growing sophistication of threat actors and the widespread impact of ransomware on global operations.
INCIDENT DETAILS -
TYPE
Ransomware
IMPACT
Data Compromised: No evidence of customer data stolenSystems Affected: Global applicationsOperational Impact: Severely disrupted retail and production activities
DATA BREACH
Data Exfiltration: No evidence of data exfiltration
DECEMBER 2025
711Before Incident
NOVEMBER 2025
722Before Incident
OCTOBER 2025
721Before Incident
SEPTEMBER 2025
719Before Incident
AUGUST 2025
717Before Incident
JUNE 2025
739Before Incident
Breach
23 Jun 2025Nucor Corporation
Nucor

Data Breach at Nucor

698After Incident
CRITICAL-41
NUC607062325
Nucor, North America's largest steel producer and recycler, experienced a cybersecurity incident that resulted in the theft of data from its network. The attack caused a temporary halt in production at some facilities and limited access to certain IT applications. The company took proactive measures by temporarily halting production operations and notifying law enforcement and cybersecurity experts. The nature of the attack and the extent of data exfiltrated are still under investigation, but it is confirmed that threat actors exfiltrated limited data. The company has restored access to affected systems and believes the threat actors have been evicted.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
Data Compromised: Limited dataSystems Affected: Some systemsDowntime: Temporary limitation of access to portions of the Company's information technology applicationsOperational Impact: Halted production at some facilities
DATA BREACH
Type Of Data Compromised: Limited dataData Exfiltration: Yes
MAY 2025
778Before Incident
Breach
13 May 2025Nucor Corporation
Nucor Corporation

Cyberattack on Nucor Corporation

738After Incident
CRITICAL-40
NUC603062325
Nucor Corporation, a leading U.S. steelmaker, suffered a cyberattack on May 13, 2025, which led to unauthorized access to their computer systems. The company proactively shut down production operations at multiple steel manufacturing facilities as a safety measure. The volume of compromised data was described as 'limited,' and the company is still reviewing what information was stolen. All production facilities have resumed normal operations, and the hackers no longer have access to company systems.
INCIDENT DETAILS -
TYPE
Cyberattack
IMPACT
Data Compromised: limitedproduction operationsinformation technology applicationstemporary production shutdownstemporary limitations to IT applicationsOperational Impact: multiple facilities within Nucor’s nationwide network of steel production plants
DATA BREACH
Type Of Data Compromised: limited datasetsData Exfiltration: yes
MAY 2023
814Before Incident
Breach
26 May 2023Nucor Corporation
Nucor Corporation

Data Breach at Nucor Corporation

761After Incident
MEDIUM-53
NUC252072525
The Maine Office of the Attorney General reported a data breach involving Nucor Corporation on July 3, 2023. The breach occurred between May 26, 2023, and June 1, 2023, due to an external system breach (hacking), affecting a total of 8,824 individuals, including 2 residents of Maine. The compromised information included names, bank account numbers, routing numbers, and amounts deposited.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
namesbank account numbersrouting numbersamounts deposited
DATA BREACH
namesbank account numbersrouting numbersamounts depositedSensitivity Of Data: Highnamesbank account numbersrouting numbersamounts deposited

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