DisclosureLens
HackingManufacturingManufacturingVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

NUCOR CORPORATION

bd_b6fb6e4436443cf8 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 1, 2023

Filed

Jul 3, 2023

To disclose

5 weeks

Affected

3state residents only

Linked

7 filings

Confidence

66%
Full breach record for NUCOR CORPORATION4 incidents on file

Nucor Corporation reported a data breach affecting 3 New Hampshire residents. Unauthorized third parties exploited a previously unknown vulnerability in a third-party file transfer software between May 26 and June 1, 2023, to acquire files containing personal information including names, addresses, Social Security numbers, and dates of birth. Nucor disabled access, applied a vendor fix, engaged forensic investigators, and offered credit monitoring services.

Incident timeline

undetected · 6 days
discovery → filing · 5 weeks / 32 days

May 26, 2023

Begins

Jun 1, 2023

Discovered

Jul 3, 2023

Filed

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

Show 2 more filingsup to 183d gap

Filing propagation · 7 filings · 7 states

View merged incident ↗
Illinois State AGJan 1 · first
New Hampshire State AG+183d · this page

Pattern: first filing Jan 1 (IL), last Jul 3 (NH) — a 183-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.