HackingFinancial ServicesTechnologyFinanceSupply Chain (3P Vendor)Customer Data InvolvedPIIIdentity (basic)MediumContained

TransUnion

bd_d7d141dc595dd1b0 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Sep 4, 2025

To disclose

—

Affected

78,834state residents only

Linked

15 records

Confidence

65%

Full breach record for TransUnion →11 incidents on file

TransUnion LLC notified South Carolina consumers of a cyber incident involving unauthorized access to personal data stored on a third-party application used for U.S. consumer support operations. No credit reports or core credit information were accessed. TransUnion is offering 24 months of credit monitoring and fraud assistance.

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South Carolina clock✓ SC CRA notice due

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline — partial

? — ?

Breach window unknown

Sep 4, 2025

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

This filing is one of 15 records about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

New Hampshire State AGbd_331561e568edbb3f2025-09-04Verified by operator
Texas State AGbd_83b605646965217d2025-09-04Verified by operator
Massachusetts State AGbd_d87eb450bda408862025-09-04Verified by operator
Montana State AGbd_9bac2141a674997f2025-09-03 · +1dVerified by operator

Show 6 more filings ↓up to 8d gap

Oregon State AGbd_5b59f10c6f6c553f2025-09-02 · +2dVerified
Iowa State AGbd_fd85f6604075cd912025-09-02 · +2dVerified by operator
Vermont State AGbd_82d4818cdee39c862025-09-01 · +3dVerified by operator
Nebraska State AGbd_aaa181287c2471442025-09-08 · +4dVerified by operator
California State AGbd_217b0e65bf1e48972025-08-27 · +8dVerified by operator
Maine State AGbd_9d7ad1a3ef9bd9ae2025-08-27 · +8dVerified by operator

Showing first 10 of 14 linked disclosures.

Name: TransUnion
norm: transunion
Domain: transunion.com

Name: TransUnion
norm: transunion
Domain: transunion.com
Industry: Financial ServicesllmTechnologyllm

Discovered: —
Materiality determined: —
Notification sent: Aug 1, 2025
Affected individuals: 78,834state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: External
Regulator citations: Filed Security Breach Notice with South Carolina Office of the Consumer Advocate
Third party: via Third-party application serving U.S. consumer support operations
Initial access: supply_chain

During the incident: Providing access to credit monitoring services for 24 months
Providing proactive fraud assistance through Cyberscout
Enhancing security controls to minimize risk of similar incident
Changes made: Enhancing security controls as appropriate to minimize the risk of any similar incident in the future
Source: Quoted from the filing itself, not independently verified.

Compliance flags: SC CRA notice due
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

California State AGAug 27 · first

Maine State AGAug 27 · first

New Hampshire State AG+8d

Texas State AG+8d

Massachusetts State AG+8d

South Carolina State AG+8d · this page

Nebraska State AG+12d

Pattern: first filing Aug 27 (CA), last Sep 8 (NE) — a 12-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 14 — the full spread may be wider.

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://consumer.sc.gov/sites/consumer/files/Documents/Security%20Breach%20Notices/2025/Consumer%20Letter%20-%20TransUnion.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 4, 2025
Raw hash: 947b7d514dbe6eea552903a9b65dc972109273d920fea7a22a5b6bb593c917f2

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityTransUnion

Victim entityTransUnion

IncidentThird-Party / Supply Chain

Stated responseProviding access to credit monitoring services for 24 months

ComplianceSC CRA notice due

Extraction provenanceno artifact recorded

Source provenanceconsumer.sc.gov