HackingFinancial ServicesHealthcareFinanceData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHealth (basic)PHIMediumContained

Sentinel Security Life Insurance Company

bd_379fab7713473e3e · schema v1 · pii pii-v2

Severity

Medium

Discovered

Apr 15, 2025

Filed

Dec 30, 2025

To disclose

—

Affected

631state residents only

Linked

5 filings

Confidence

66%

Full breach record for Sentinel Security Life Insurance Company →

Sentinel Security Life Insurance Company and Atlantic Coast Life Insurance Company notified Nebraska regulators of a data breach affecting 631 residents. Unauthorized access occurred between April 7 and April 15, 2025. Affected data included names, SSNs, driver's license numbers, DOBs, and health/financial information. Notices were sent on December 30, 2025, offering one year of credit monitoring.

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Incident timeline

undetected · 8 days

Apr 7, 2025

Begins

Apr 15, 2025

Discovered

Dec 30, 2025

Filed

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

California State AGbd_7dc606c04064a1cc2025-12-30Candidate
New Hampshire State AGbd_cfd3298946a9660a2025-12-30Verified
Montana State AGbd_dec7091fc45e2ef32025-12-30Verified
Iowa State AGbd_ea0923490f6560062025-12-30Verified

Name: Sentinel Security Life Insurance Company
norm: sentinel security life insurance

Name: Sentinel Security Life Insurance Company
norm: sentinel security life insurance
Industry: Financial ServicesllmHealthcarellm

Discovered: Apr 15, 2025
Breach occurred: Apr 7, 2025 – Apr 15, 2025
Undetected for: 8 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 30, 2025
Affected individuals: 631state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)PHI
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1119 Automated Collection
Threat actor: External
Regulator citations: Notified federal law enforcement regarding the incidentProviding written notice of this incident to relevant state regulators
Initial access: exploit_public_facing

During the incident: Initiated incident response procedures
Isolated relevant systems
Began an investigation to identify potentially affected individuals
Reviewing their policies, procedures, and processes related to the storage of, and access to, personal information
Working to implement additional safeguards and training to their employees
Providing access to credit monitoring and identity restoration services for one (1) year, through IDX
Notified federal law enforcement regarding the incident
Providing written notice of this incident to relevant state regulators
Providing written notice of this incident to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Reviewing their policies, procedures, and processes related to the storage of, and access to, personal information to reduce the likelihood of a similar future incident
Working to implement additional safeguards and training to their employees
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

California State AGDec 30 · first

New Hampshire State AGDec 30 · first

Montana State AGDec 30 · first

Iowa State AGDec 30 · first

Nebraska State AGDec 30 · first · this page

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://nebraska.gov/ago/data-breach/documents/1a55fa98-9f8a-43c5-ba3f-4a0f951ae1f3.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 30, 2025
Raw hash: 56b0296865de0ec1563984daaf3c23e220bc0b19ffe8febeee413ffaef8837fe

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entitySentinel Security Life Insurance Company

Victim entitySentinel Security Life Insurance Company

Incidentdiscovered Apr 15, 2025

Stated responseInitiated incident response procedures

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov