Confirmed breach. Intrusion Feb 13, 2025–Mar 17, 2025, discovered Feb 13, 2025 — the first regulatory filing landed 91 days later. 42,518 individuals reported across the linked filings.
Discovery variance · Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
State AGConfirmedLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforced
Affected (total reported)
42,518
Data types
—
Jurisdictions
2
IN NH
Linked filings
2
all State AG
Timeline
Earliest sighting first · deep chronology in Litigation Timeline
Breach window
Feb 13, 2025
When the intrusion reportedly occurred, per the linked filings
Duo County Telephone Cooperative Corporation Inc and Cumberland Cellular LLC reported a data breach to the Indiana Attorney General. The breach occurred on 2025-02-13 and was reported on 2025-05-15. 1,023 Indiana residents were affected. 42,518 individuals affected in total.
Affected (this filing): 42,518
⛰️New Hampshire State AGMost recentlinked via multistate filing link · 100%
Duo Broadband (Duo County Telephone Cooperative Corp. and Cumberland Cellular, LLC) notified the NH AG of a third-party billing vendor (Communications Data Group, Inc.) breach. A threat actor attempted ransomware deployment and gained unauthorized access to customer data (PII) on March 17, 2025. 3 NH residents affected. No evidence of misuse. Kroll engaged for credit monitoring.
Affected (this filing): 3
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.