HackingHealthcareTechnologyHealthcareBusiness Associate (HIPAA)Customer Data InvolvedDelayed DiscoveryPHIIdentity (basic)Health (basic)LowContained

Aesto Health

bd_65f70444b3fbe6f7 · schema v1 · pii pii-v2

Severity

Low

Discovered

Dec 18, 2025

Filed

Aug 24, 2026

To disclose

36 weeks

Affected

Not disclosed

Linked

13 filings

Confidence

66%

Full breach record for Aesto Health →2 incidents on file

Aesto LLC, a healthcare data migration and archiving services provider, experienced a network security incident impacting its Amazon Web Services infrastructure. An unauthorized actor accessed and/or acquired personal information pertaining to care for some individuals between December 2 and December 18, 2025. Aesto discovered the incident on December 18, 2025. The affected data includes full names and other variable personal health information. Aesto notified its healthcare provider client, Allied Health MSO Holdco, LLC, on June 26, 2026. Aesto is offering complimentary credit monitoring and identity theft protection services to affected individuals.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 16 days

discovery → filing · 36 weeks / 249 days

Dec 2, 2025

Begins

Dec 18, 2025

Discovered

Aug 24, 2026

Filed

vs. sector median

+26 wks slower

This filing is one of 13 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Massachusetts State AGbd_a7593a37841d8ff02026-09-01 · +8dVerified
Massachusetts State AGbd_b1d347b681553e3a2026-09-01 · +8dVerified
Oregon State AGbd_ffdc3411341bf72d2026-08-05 · +19dVerified
Washington State AGbd_6ba6b179ea4373bf2026-08-04 · +20dVerified

Show 6 more filings ↓up to 60d gap

Illinois State AGbd_49a6928816a82c852026-08-01 · +23dVerified
Illinois State AGbd_a10ec3898d9326e02026-08-01 · +23dVerified
New Hampshire State AGbd_7148309868a16c342026-09-25 · +32dVerified
Vermont State AGbd_8145059268bb2d362026-09-25 · +32dVerified
California State AGbd_b3f56c134cd959942026-10-01 · +38dVerified
New Hampshire State AGbd_be053c291c764c092026-10-23 · +60dVerified

Showing first 10 of 12 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: —
Affected individuals: Not disclosed
Data types: PHIIdentity (basic)Health (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified California Attorney General
Third party: via Allied Health MSO Holdco, LLCbusiness associate

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
Notified your healthcare provider, Allied Health MSO Holdco, LLC, of this incident
Provided Allied Health with the affected data and list of impacted individuals
Offering you the opportunity to enroll in complimentary credit monitoring and identity theft protection services, including a $1,000,000 identity theft insurance policy, at no charge to you
Providing you with proactive fraud assistance to help with any questions that you might have or in event that you become a victim of fraud
Set up a dedicated and confidential toll-free response line that we have set up to respond to questions
Changes made: Continually evaluate and modify our practices and internal controls to enhance the security and privacy of your personal information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 36 weeks(249 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 · 7 states

View merged incident ↗

Illinois State AGAug 1 · first

Washington State AG+3d

Oregon State AG+4d

California State AG+23d · this page

Massachusetts State AG+31d

New Hampshire State AG+55d

Vermont State AG+55d

California State AG+61d

New Hampshire State AG+83d

Pattern: first filing Aug 1 (IL), last Oct 23 (NH) — a 83-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 12 — 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://oag.ca.gov/ecrime/databreach/reports/sb24-628809
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 24, 2026
Raw hash: bf14e9df05cf41c4068dcf09e640766eb50781e6a45d8a91b5bdd58d962089ed

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 provenanceoag.ca.gov