HackingHealthcareTechnologyHealthcareData ExfiltratedCustomer Data InvolvedDelayed DiscoveryPHIHealth (basic)Government IDIdentity (basic)Financial accountMediumContained

Aesto Health

bd_b3f56c134cd95994 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Dec 18, 2025

Filed

Oct 1, 2026

To disclose

41 weeks

Affected

Not disclosed

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 a portion of its AWS infrastructure. Unauthorized access occurred between December 2 and December 18, 2025, and was discovered on December 18, 2025. Protected health information, including names, dates of birth, medical information, driver's license numbers, financial account numbers, health insurance information, ITINs, and Social Security numbers, may have been accessed or acquired. Aesto engaged external cybersecurity professionals (GuidePoint) for investigation and remediation, which included closing security gaps, deleting impacted Lambda functions, and rotating AWS secrets. The incident is contained. Aesto is offering to notify HHS OCR on behalf of affected covered entities and providing notification packages for individual notices.

J jump to incidentP pin to compareR raw source

California clockDiscovered Dec 18, 2025 → Notified Jun 26, 2026190d ✗ CA 60-day late41 weeks discovery → filing

Incident timeline

undetected · 16 days

discovery → filing · 41 weeks / 287 days

Dec 2, 2025

Begins

Dec 18, 2025

Discovered

Oct 1, 2026

Filed

vs. sector median

+32 wks slower

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

New Hampshire State AGbd_7148309868a16c342026-09-25 · +6dVerified
Vermont State AGbd_8145059268bb2d362026-09-25 · +6dVerified
Massachusetts State AGbd_a7593a37841d8ff02026-09-01 · +30dVerified
Massachusetts State AGbd_b1d347b681553e3a2026-09-01 · +30dVerified

Show 6 more filings ↓up to 62d gap

California State AGbd_65f70444b3fbe6f72026-08-24 · +38dVerified
Oregon State AGbd_ffdc3411341bf72d2026-08-05 · +57dVerified
Washington State AGbd_6ba6b179ea4373bf2026-08-04 · +58dVerified
Illinois State AGbd_49a6928816a82c852026-08-01 · +61dVerified
Illinois State AGbd_a10ec3898d9326e02026-08-01 · +61dVerified
HHS OCRbd_6054557cd914ee672026-07-31 · +62dCandidate

Showing first 10 of 11 linked disclosures.

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: Jun 26, 2026
Affected individuals: Not disclosed
Data types: PHIHealth (basic)Government IDIdentity (basic)Financial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Offering to notify HHS OCR on behalf of covered entities if they opt-in

During the incident: Launched a thorough investigation with experienced external cybersecurity professionals
Secured our network
Reset credentials
Enhanced our security measures and monitoring tools
Reviewing our existing policies and training protocols
Providing an attestation from our cybersecurity professionals detailing the root cause of the incident
Changes made: Closed the security gaps exploited by the threat actor to gain access to the network
Deleted the impacted Lambda functions
Rotated all impacted AWS secrets
Deleted unauthorized files uploaded by the threat actor
Continuing monitoring of the network
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 41 weeks(287 days from discovery to filing)
Compliance flags: CA 60-day late · 190dCA AG copy >15d · 97d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
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: Oct 1, 2026
97d 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: Oct 1, 2026	97d	15 calendar days	CA AG copy >15d

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

New Hampshire State AG+56d

Vermont State AG+56d

California State AG+62d · this page

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://oag.ca.gov/ecrime/databreach/reports/sb24-630668
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 1, 2026
Raw hash: 4104e3c7800e75a1165a7dc27625548a5c25fd7e5781c7b11a5b91a34e505510

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityAesto, LLC

Victim entityAesto Health

Incidentdiscovered Dec 18, 2025

Stated responseLaunched a thorough investigation with experienced external cybersecurity professionals

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov