Nucor Corporation data breach (2025)

FEDERALSEC 8-KFirst filinglinked via same-victim cross-source · 100%

Filed Jun 20, 2025bd_5d4a1347ab3beb1c

Nucor Corporation filed an 8-K/A amendment (Item 1.05) on June 20, 2025 supplementing its May 14, 2025 disclosure of a cybersecurity incident. Investigation determined a threat actor illegally accessed Nucor's IT systems and exfiltrated limited data, causing temporary halt of production at some facilities. Affected operations and IT access have been restored; Nucor believes the threat actor no longer has access. Company states the incident has not had and is not reasonably likely to have a material impact on its business or financials.

🏎️Indiana State AGlinked via same-victim cross-source · 100%

🍁Vermont State AG

Filed Jun 24, 2025bd_f0b0185bf1d1823b

Nucor Corporation notified Vermont AG of a cybersecurity incident where an unauthorized third party accessed and acquired personal information (including SSNs) from May 3-13, 2025. Nucor engaged forensic specialists, reported to law enforcement, implemented safeguards, and offered 2 years of Equifax credit monitoring.

VT AG >14 bday

⛰️New Hampshire State AGlinked via same-victim cross-source · 100%

Filed Jun 27, 2025bd_9461555a0a074d8a

Nucor Corporation reported unauthorized access to IT systems affecting one New Hampshire resident. The incident occurred between May 3 and May 13, 2025, and was detected on May 13, 2025. Compromised data included SSN, corporate credit card number, and DOB. Nucor engaged third-party specialists, notified law enforcement, and provided 24 months of credit monitoring.

Affected (this filing): 1

⛰️New Hampshire State AGlinked via same-victim cross-source · 100%

Filed Jun 30, 2025bd_70306daf12f7c0d8

Nucor Corporation reported unauthorized access to IT systems affecting one New Hampshire resident. The incident occurred between May 3 and May 13, 2025, and was detected on May 13, 2025. Data accessed included SSN, corporate credit card number, and DOB. Nucor engaged third-party cybersecurity specialists, notified law enforcement, and provided 24 months of credit monitoring. Additional technical safeguards were implemented.

Affected (this filing): 1

NUCOR CORPORATION

Litigation Timing

Affected residents by state

Timeline