Cierant
bd_d4221b679ab06c8d · schema v1 · pii pii-v1
Full breach record for Cierant →Cierant Corporation notified Montana residents of a data security event discovered on December 10, 2024. An unauthorized actor exploited a vulnerability in the third-party Cleo VLTrader secure file transfer tool to gain access to Cierant systems. The incident compromised personal and health information, including names, addresses, dates of birth, medical record numbers, and health plan beneficiary numbers. The breach also affected minors' data. Cierant ceased using the tool, rotated passwords, enhanced security controls, and notified law enforcement and regulators. Approximately 373 Rhode Island residents were identified as impacted.
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Incident timeline
Dec 10, 2024
Discovered
Jul 7, 2025
Filed
vs. sector median
+19 wks slower
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
- Washington State AGbd_3dde15084b7b9d422025-07-07Verified
- California State AGbd_dc825fbbaeb958ce2025-07-07Verified
- Texas State AGbd_a2f1dac33b9456df2025-07-08 · +1dVerified
Show 2 more filings ↓Show fewer ↑up to 6d gap
- HHS OCRbd_af706982660950002025-07-03 · +4dVerified by operator
- Illinois State AGbd_f1e6a8237f126a062025-07-01 · +6dCandidate
Filing propagation · 7 filings · 6 states
View merged incident ↗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
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.