HackingHealthcareTechnologyHealthcareCustomer Data InvolvedBusiness Associate (HIPAA)PHIIdentity (basic)LowContained

Aesto Health

bd_a7593a37841d8ff0 · schema v1 · pii pii-v2

Severity

Low

Discovered

Dec 18, 2025

Filed

Sep 1, 2026

To disclose

—

Affected

110state residents only

Linked

12 filings

Confidence

68%

Full breach record for Aesto Health →2 incidents on file

Aesto, LLC, a healthcare data migration and archiving service provider, experienced a network security incident impacting its AWS infrastructure. Unauthorized access to protected health information (PHI) and identity data occurred between December 2 and December 18, 2025. The incident was discovered on December 18, 2025. Aesto engaged external cybersecurity professionals for forensic investigation. Affected individuals include residents of Massachusetts and Rhode Island. Complimentary credit monitoring and identity theft protection services were offered for 12 months.

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Incident timeline

undetected · 16 days

Dec 2, 2025

Begins

Dec 18, 2025

Discovered

Sep 1, 2026

Filed

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

Massachusetts State AGbd_b1d347b681553e3a2026-09-01Verified
California State AGbd_65f70444b3fbe6f72026-08-24 · +8dVerified
New Hampshire State AGbd_7148309868a16c342026-09-25 · +24dVerified
Vermont State AGbd_8145059268bb2d362026-09-25 · +24dVerified

Show 6 more filings ↓up to 32d gap

Oregon State AGbd_ffdc3411341bf72d2026-08-05 · +27dVerified
Washington State AGbd_6ba6b179ea4373bf2026-08-04 · +28dVerified
California State AGbd_b3f56c134cd959942026-10-01 · +30dVerified
Illinois State AGbd_49a6928816a82c852026-08-01 · +31dVerified
Illinois State AGbd_a10ec3898d9326e02026-08-01 · +31dVerified
HHS OCRbd_6054557cd914ee672026-07-31 · +32dCandidate

Showing first 10 of 11 linked disclosures.

Name: Aesto Health
norm: aesto health
Domain: aestohealth.com

Name: Aesto Health
norm: aesto health
Domain: aestohealth.com
Industry: HealthcarellmTechnologyllm

Discovered: Dec 18, 2025
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 16 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 4, 2026
Affected individuals: 110state-resident count only
Data types: PHIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External

During the incident: Commenced a prompt and thorough investigation
Worked very closely with external cybersecurity professionals experienced in handling these types of incidents
Conducted extensive forensic investigation and manual document review
Informed your provider of this incident for the first time on July 7, 2026
Offered complimentary access to credit monitoring and identity theft protection services for twelve (12) months through Cyberscout, a TransUnion company
Set up a dedicated and confidential toll-free response line to respond to questions
Changes made: Continually evaluate and modify practices and internal controls to enhance the security and privacy of personal information
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 · 11 filings · 8 states

View merged incident ↗

HHS OCRJul 31 · first

Illinois State AG+1d

Washington State AG+4d

Oregon State AG+5d

California State AG+24d

Massachusetts State AG+32d

Massachusetts State AG+32d · this page

New Hampshire State AG+56d

Vermont State AG+56d

California State AG+62d

Pattern: first filing Jul 31 (AL), last Oct 1 (CA) — a 62-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://www.mass.gov/doc/2026-1633-aesto-llc/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 1, 2026
Raw hash: 8c0ba830eb6bc665b47b4a3dfc3bbd38e5b035f77b04a5869409e8f291cd31ef

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityAesto Health

Victim entityAesto Health

Incidentdiscovered Dec 18, 2025

Stated responseCommenced a prompt and thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov