HackingProfessional ServicesProfessional ServicesStolen CredentialsCustomer Data InvolvedFinancial accountFinancial credentialsIdentity (basic)LowContained

American Association of Critical-Care Nurses

bd_d266e08df4700389 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 31, 2025

Filed

Aug 29, 2025

To disclose

29 days

Affected

153state residents only

Linked

12 filings

Confidence

66%

Full breach record for American Association of Critical-Care Nurses →

American Association of Critical-Care Nurses (AACN) notified Montana residents of a data security incident involving its website payment system. Unauthorized access to payment card information (card number, expiry, CVV) and customer contact details occurred starting March 8, 2025, and was discovered on July 31, 2025. Notices were sent August 29, 2025. AACN engaged security experts, secured the system, and offers two years of credit monitoring.

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Incident timeline

undetected · 145 days

discovery → filing · 29 days

Mar 8, 2025

Begins

Jul 31, 2025

Discovered

Aug 29, 2025

Filed

vs. sector median

15 wks faster

This filing is one of 12 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

California State AGbd_475370cbda26655d2025-08-29Candidate
Washington State AGbd_49932d69751ea9cc2025-08-29Verified
Oregon State AGbd_6820d7d37f0ea9fd2025-08-29Verified
Nebraska State AGbd_6f8364c27b37a2862025-08-29Verified

Show 6 more filings ↓up to 6d gap

Indiana State AGbd_80f7a1e26b0cb5732025-08-29Verified
Massachusetts State AGbd_d4fb7c7a274a91792025-08-29Verified
New Hampshire State AGbd_d512ba3bd7ec0b452025-08-29Verified
Maine State AGbd_e05bd527f050d9972025-08-29Verified
Vermont State AGbd_db08057b57a2eded2025-09-02 · +4dVerified
Texas State AGbd_8242bb219dadeba02025-09-04 · +6dVerified

Showing first 10 of 11 linked disclosures.

Name: American Association of Critical-Care Nurses
norm: american association of critical care nurses
Domain: aacn.org

Name: American Association of Critical-Care Nurses
norm: american association of critical care nurses
Domain: aacn.org
Industry: Professional Servicesllm

Discovered: Jul 31, 2025
Breach occurred: Mar 8, 2025
Undetected for: 145 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 29, 2025
Affected individuals: 153state-resident count only
Data types: Financial accountFinancial credentialsIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Initial access: exploit_public_facing

During the incident: Investigated the issue with the help of our payment processor and outside security experts
Took steps to secure the payment system
Implemented further security enhancements
Changes made: Implemented further security enhancements to help remediate the issue
Continuing to enhance our safeguards to help prevent similar issues from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 29 days(29 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

California State AGAug 29 · first

Washington State AGAug 29 · first

Oregon State AGAug 29 · first

Nebraska State AGAug 29 · first

Indiana State AGAug 29 · first

Massachusetts State AGAug 29 · first

New Hampshire State AGAug 29 · first

Maine State AGAug 29 · first

Montana State AGAug 29 · first · this page

Vermont State AG+4d

Texas State AG+6d

Pattern: first filing Aug 29 (CA), last Sep 4 (TX) — a 6-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 11 — the full spread may be wider.

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://dojmt.gov/wp-content/uploads/2025/09/Consumer-notification-letter-26.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 29, 2025
Raw hash: 969218c7e21e15c4e349d9c27bbca3864f5505339911c43a7d71c8bbc93d3ab9

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityAmerican Association of Critical-Care Nurses

Victim entityAmerican Association of Critical-Care Nurses

Incidentdiscovered Jul 31, 2025

Stated responseInvestigated the issue with the help of our payment processor and outside security experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov