HackingTechnologyHealthcareInformationVulnerability ExploitData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedHealth (basic)Identity (basic)Government IDMinorPHIMediumContained

Cierant

bd_3dde15084b7b9d42 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 10, 2024

Filed

Jul 7, 2025

To disclose

30 weeks

Affected

902state residents only

Linked

8 records

Confidence

69%

Full breach record for Cierant →

Cierant Corporation, a distributed marketing software company, disclosed a data security event affecting health plan member data. An unauthorized actor exploited a vulnerability in the third-party Cleo VLTrader secure file transfer tool to gain access to systems. The incident impacted approximately 902 individuals, including names, addresses, dates of birth, medical record numbers, and health plan beneficiary numbers. The breach was discovered on December 10, 2024, and notifications were sent on July 3, 2025.

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Washington clock✗ WA AG >90d30 weeks 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 · 49 days

discovery → filing · 30 weeks / 209 days

Oct 22, 2024

Begins

Dec 10, 2024

Discovered

Jul 7, 2025

Filed

vs. sector median

+19 wks slower

This filing is one of 8 records about the same incident.View merged incident

A leak claim by cl0p about this victim was first seen 156 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitecl0pbd_07daf6a1b38451a92025-02-01 · +155dVerified by operator

Regulatory filings (6) · sorted by filing gap

Washington State AGbd_15d0ae25a9674afd2025-07-07Verified
Montana State AGbd_d4221b679ab06c8d2025-07-07Verified
California State AGbd_dc825fbbaeb958ce2025-07-07Verified
Texas State AGbd_a2f1dac33b9456df2025-07-08 · +1dVerified

Show 2 more filings ↓up to 6d gap

HHS OCRbd_af706982660950002025-07-03 · +4dVerified by operator
Illinois State AGbd_f1e6a8237f126a062025-07-01 · +6dCandidate

Name: Cierant
norm: cierant
Domain: cierant.com

Name: Cierant
norm: cierant
Domain: cierant.com
Industry: TechnologyllmHealthcarellm

Discovered: Dec 10, 2024
Breach occurred: Oct 22, 2024 – Dec 9, 2024
Undetected for: 49 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 3, 2025
Affected individuals: 902state-resident count only
Data types: Identity (basic)Government IDHealth (basic)Minor
Data elements: NameDate of birthHealth insurance IDMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found after the fact
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: Notifying relevant regulatorsReported the event to federal law enforcement
Initial access: exploit_public_facing

During the incident: Ceased the use of Cleo VLTrader
Rotated passwords
Enhanced existing network security controls
Reported the event to federal law enforcement
Notifying relevant regulators
Began an investigation with assistance from an industry-leading cybersecurity team
Changes made: Enhanced existing network security controls
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 30 weeks(209 days from discovery to filing)
Compliance flags: WA AG >90dLeak >90d
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.

Filing propagation · 7 filings · 6 states

View merged incident ↗

Illinois State AGJul 1 · first

HHS OCR+2d

Washington State AG+6d

Montana State AG+6d

California State AG+6d

Washington State AG+6d · this page

Texas State AG+7d

Pattern: first filing Jul 1 (IL), last Jul 8 (TX) — a 7-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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA33868.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 7, 2025
Raw hash: 0f56c2485879bf87071bdb2a91c8a80b17b9352497ea9330503318efdd6d6f1f

Linked disclosures

Ransomware claims (1)

Regulatory filings (6) · sorted by filing gap

Reporting entityCierant

Victim entityCierant

Incidentdiscovered Dec 10, 2024

Stated responseCeased the use of Cleo VLTrader

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com