HackingHealthcareTechnologyHealthcareStolen CredentialsData ExfiltratedCustomer Data InvolvedBusiness Associate (HIPAA)PHIHealth (basic)Identity (basic)LowContained

Aesto Health

bd_b48dbb172911c31e · schema v1 · pii pii-v2

Severity

Low

Discovered

Dec 18, 2025

Filed

Aug 20, 2026

To disclose

35 weeks

Affected

Not disclosed

Linked

3 filings

Confidence

65%

Full breach record for Aesto Health →6 incidents on file

Aesto, LLC, a healthcare data migration and archiving service provider, experienced a network security incident impacting its AWS infrastructure. An unauthorized actor accessed and/or acquired protected health information (PHI) between December 2 and December 18, 2025. Aesto discovered the incident on December 18, 2025, and confirmed the scope of data exposure on May 26, 2026. Affected data includes full names and health-related information. Aesto engaged external cybersecurity professionals, notified healthcare providers, and offered credit monitoring services to affected individuals.

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Incident timeline

undetected · 16 days

discovery → filing · 35 weeks / 245 days

Dec 2, 2025

Begins

Dec 18, 2025

Discovered

Aug 20, 2026

Filed

vs. sector median

+24 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

New Hampshire State AGbd_c547969d194bb5d12026-08-07 · +13dVerified
Washington State AGbd_6ba6b179ea4373bf2026-08-04 · +16dCandidate

Name: Aesto, LLC
norm: aesto

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: PHIHealth (basic)Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Filed notification with California Attorney General

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 of this incident on July 10, 2026
Offering a complimentary 12/24 month membership of Epiq Privacy Solutions Plus
Set up a dedicated and confidential toll-free response line
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.

Time to disclose: 35 weeks(245 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Washington State AGAug 4 · first

New Hampshire State AG+3d

California State AG+16d · this page

Pattern: first filing Aug 4 (WA), last Aug 20 (CA) — a 16-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/sb24-628598
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 20, 2026
Raw hash: 9cae2cb8cfafb10d03834a94e9816265b76a3c10e0b5f70e4fc293c44450327f

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityAesto, LLC

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