HackingTransportation & LogisticsTransportationData ExfiltratedEmployee Data InvolvedIdentity (basic)Government IDFinancial accountPHIHealth (basic)MediumContained

YELLOW CORPORATION

bd_599e40dc7dee1087 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 27, 2025

Filed

Jun 26, 2026

To disclose

15 months

Affected

Not disclosed

Linked

9 filings

Confidence

64%

Full breach record for YELLOW CORPORATION →

Yellow Corporation identified suspicious activity and unauthorized exfiltration of files on March 27, 2025. The incident involved former employee data including names, SSNs, financial account numbers, and medical information. Systems were restored from backups and additional safeguards implemented. No specific count of affected individuals was disclosed.

J jump to incidentP pin to compareR raw source

California clockDiscovered Mar 27, 2025 → Notified Jun 26, 2026456d ✗ CA 60-day late15 months discovery → filing

Incident timeline

discovery → filing · 15 months / 456 days

Mar 27, 2025

Begins

Mar 27, 2025

Discovered

Jun 26, 2026

Filed

This filing is one of 9 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (8) · sorted by filing gap

New Hampshire State AGbd_02ca38c55dca01572026-06-26Verified
Massachusetts State AGbd_1b4409988dd125be2026-06-26Verified
Indiana State AGbd_25143fe3a8be2bc12026-06-26Verified
Nebraska State AGbd_47a170a06047880f2026-06-26Verified

Show 4 more filings ↓up to 25d gap

South Carolina State AGbd_c2e30e440f2ff96c2026-06-26Candidate
Texas State AGbd_d6742a202bfb3dfb2026-06-30 · +4dVerified
Oregon State AGbd_cd729262a7431f712026-07-08 · +12dVerified
Illinois State AGbd_040097e5b8b9a3032026-06-01 · +25dVerified

Name: YELLOW CORPORATION
norm: yellow
Domain: www.myyellow.com

Name: YELLOW CORPORATION
norm: yellow
Domain: www.myyellow.com
Industry: Transportation & Logisticsllm

Discovered: Mar 27, 2025
Breach occurred: Mar 27, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 26, 2026
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial accountPHIHealth (basic)
Data elements: Social Security numberDate of birthMedical information
Attack vector: Unknown
MITRE ATT&CK: T1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notifying relevant regulators where necessary

During the incident: Launched an investigation with the assistance of third-party cybersecurity specialists
Briefly took the systems offline
Securely restored systems from backups
Implemented additional technical safeguards to mitigate the reoccurrence of this type of event
Changes made: Implemented additional technical safeguards to mitigate the reoccurrence of this type of event
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 months(456 days from discovery to filing)
Compliance flags: CA 60-day late · 456d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Mar 27, 2025
→ Notified: Jun 26, 2026
456d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Mar 27, 2025 → Notified: Jun 26, 2026	456d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 9 filings · 9 states

View merged incident ↗

Illinois State AGJun 1 · first

New Hampshire State AG+25d

Massachusetts State AG+25d

Indiana State AG+25d

Nebraska State AG+25d

South Carolina State AG+25d

California State AG+25d · this page

Texas State AG+29d

Oregon State AG+37d

Pattern: first filing Jun 1 (IL), last Jul 8 (OR) — a 37-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.

Source URL: https://oag.ca.gov/ecrime/databreach/reports/sb24-625494
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 26, 2026
Raw hash: b547ccd6fdf911ab12798808ad9b5759979213d110384bfd50d1c40f5f6e1d74

Linked disclosures

Regulatory filings (8) · sorted by filing gap

Reporting entityYELLOW CORPORATION

Victim entityYELLOW CORPORATION

Incidentdiscovered Mar 27, 2025

Stated responseLaunched an investigation with the assistance of third-party cybersecurity specialists

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov