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

AESTO, LLC

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

9 filings

Confidence

66%

Full breach record for AESTO, LLC →

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

+25 wks slower

This filing is one of 9 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (8) · sorted by filing gap

New Hampshire State AGbd_4fe674ca1413cfc02026-08-27 · +3dVerified
New Hampshire State AGbd_b5839d18101d09ca2026-08-21 · +3dVerified
New Hampshire State AGbd_eac49aabb3a023ff2026-08-21 · +3dVerified
New Hampshire State AGbd_64f64f39cb8a849a2026-08-28 · +4dVerified

Show 4 more filings ↓up to 24d gap

Massachusetts State AGbd_d39e08ca3ce7e1182026-09-01 · +8dVerified
Illinois State AGbd_49a6928816a82c852026-08-01 · +23dCandidate
Illinois State AGbd_a10ec3898d9326e02026-08-01 · +23dVerified
HHS OCRbd_6054557cd914ee672026-07-31 · +24dCandidate

Name: AESTO, LLC
norm: aesto

Name: AESTO, LLC
norm: aesto
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 · 9 filings · 5 states

View merged incident ↗

HHS OCRJul 31 · first

Illinois State AG+1d

New Hampshire State AG+21d

California State AG+24d · this page

New Hampshire State AG+27d

New Hampshire State AG+28d

Massachusetts State AG+32d

Pattern: first filing Jul 31 (AL), last Sep 1 (MA) — a 32-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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 (8) · sorted by filing gap

Reporting entityAESTO, LLC

Victim entityAESTO, LLC

Incidentdiscovered Dec 18, 2025

Stated responseCommenced a prompt and thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov