HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedIdentity (basic)Government IDPIIHighContained

TRANS UNION LLC

bd_fd6a8f2c983cc2c9 · schema v1 · pii pii-v1

Severity

High

Discovered

Jul 30, 2025

Filed

Aug 27, 2025

To disclose

28 days

Affected

88,689state residents only

Confidence

70%

Full breach record for TRANS UNION LLC →3 incidents on file

TransUnion LLC reported unauthorized access to a third-party application used for U.S. consumer support operations. The incident occurred July 28-29, 2025, and was discovered on July 30, 2025. Approximately 88,689 Washington residents were affected. No credit reports or core credit information were accessed. TransUnion provided 24 months of credit monitoring and fraud assistance.

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Washington clock✓ WA AG ≤30d28 days discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 2 days

discovery → filing · 28 days

Jul 28, 2025

Begins

Jul 30, 2025

Discovered

Aug 27, 2025

Filed

vs. sector median

4 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed88,689 affectedView incident

Name: TRANS UNION LLC
norm: trans union

Name: TRANS UNION LLC
norm: trans union
Industry: Financial Servicesllm

Discovered: Jul 30, 2025
Breach occurred: Jul 28, 2025 – Jul 29, 2025
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 27, 2025
Affected individuals: 88,689state-resident count only
Data types: PIIIdentity (basic)
Data elements: NameSocial Security numberDate of birth
WA-stated cause: Unauthorized Access
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found after the fact
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Filed breach notification with Washington Attorney General
Initial access: valid_credentials

During the incident: Providing access to credit monitoring services at no charge for 24 months
Providing proactive fraud assistance through Cyberscout
Changes made: Enhancing security controls to minimize risk of similar incident
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 28 days(28 days from discovery to filing)
Compliance flags: WA AG ≤30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA34488.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 27, 2025
Raw hash: 1329887c5f76c4ef18fb6a68089de28460038ded055a307420f9b552eb419012

Reporting entityTRANS UNION LLC

Victim entityTRANS UNION LLC

Incidentdiscovered Jul 30, 2025

Stated responseProviding access to credit monitoring services at no charge for 24 months

ComplianceWA AG ≤30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com