HackingHealthcareHealthcareData ExfiltratedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)PHIHealth (basic)LowContained

Aesto Health

bd_3a91ce22cef72ff3 · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 18, 2025

Filed

Jul 31, 2026

To disclose

32 weeks

Affected

Not disclosed

Linked

6 filings

Confidence

65%

Full breach record for Aesto Health →6 incidents on file

Everside Health reported a data breach involving its third-party vendor, Aesto, LLC. Aesto, a healthcare data migration and archiving services provider, experienced a network security incident on its AWS infrastructure between December 2 and December 18, 2025. The breach potentially exposed protected health information (PHI) and personally identifiable information (PII) of a limited number of individuals. Aesto confirmed the unauthorized access on May 26, 2026, after forensic investigation. Everside Health was notified on June 26, 2026. No evidence of misuse was found, but affected individuals were offered credit monitoring services.

J jump to incidentP pin to compareR raw source

California clockDiscovered Dec 18, 2025 → Notified Jun 26, 2026190d ✗ CA 60-day late32 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 16 days

discovery → filing · 32 weeks / 225 days

Dec 2, 2025

Begins

Dec 18, 2025

Discovered

Jul 31, 2026

Filed

vs. sector median

+21 wks slower

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

New Hampshire State AGbd_67f13a4222e410302026-07-31Verified
New Hampshire State AGbd_7afae1cfba7459a52026-07-31Verified
Vermont State AGbd_ed89224a3d3fa39d2026-07-31Verified
Massachusetts State AGbd_efc058e9ea799e382026-07-31Candidate

Show 1 more filing ↓up to 5d gap

Oregon State AGbd_ffdc3411341bf72d2026-08-05 · +5dVerified

Name: Everside Health
norm: everside health

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

Discovered: Dec 18, 2025
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 16 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 26, 2026
Affected individuals: Not disclosed
Data types: Identity (basic)PHIHealth (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Initial access: exploit_public_facing

During the incident: Commenced a prompt and thorough investigation
Worked very closely with external cybersecurity professionals
Conducted an extensive forensic investigation and manual document review
Notified the healthcare provider of this incident
Changes made: Offered a complimentary 12/24 month membership of Privacy Solutions ID through Epiq
Continually evaluate and modify practices and internal controls to enhance the security and privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 32 weeks(225 days from discovery to filing)
Compliance flags: CA 60-day late · 190dCA AG copy >15d · 35d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Dec 18, 2025
→ Notified: Jun 26, 2026
190d 60 days (analyst band, pre-2026 discoveries) CA 60-day late
California
Consumers notified: Jun 26, 2026
→ AG copy submitted: Jul 31, 2026
35d 15 calendar days CA AG copy >15d

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Dec 18, 2025 → Notified: Jun 26, 2026	190d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late
California	Consumers notified: Jun 26, 2026 → AG copy submitted: Jul 31, 2026	35d	15 calendar days	CA AG copy >15d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 5 states

View merged incident ↗

New Hampshire State AGJul 31 · first

Vermont State AGJul 31 · first

Massachusetts State AGJul 31 · first

California State AGJul 31 · first · this page

Oregon State AG+5d

Pattern: first filing Jul 31 (NH), last Aug 5 (OR) — a 5-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/sb24-627495
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 31, 2026
Raw hash: cfb04c0456ad351e119c0838525a0bf740a5bce45501aba04dc2e7cbe58ff858

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityEverside Health

Victim entityAesto Health

Incidentdiscovered Dec 18, 2025

Stated responseCommenced a prompt and thorough investigation

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov