CALIFORNIAHackingHealthcareHealthcarePHIHealth (basic)Identity (basic)MediumContained

Sierra Management Group

bd_7441c426ff9c8eb2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Jun 7, 2026

To disclose

—

Affected

1,279

Linked

2 filings

Confidence

69%

Full breach record for Sierra Management Group →2 incidents on file

Sierra Management Group reported to HHS on 2026-06-07 a Hacking/IT Incident affecting 1279 individuals. Breached information located on Network Server. Business associate present.

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Leak gap clock⏱ Leak >90d

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

⚠ No discovery dateThe OCR public portal omits the discovery date, so the 60-day notification clock cannot be evaluated from this source — only that the filing was submitted.

Incident timeline — partial

? — ?

Breach window unknown

Jun 7, 2026

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

This filing is one of 2 about the same incident.View merged incident

A leak claim by genesis about this victim predates this filing by 92 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitegenesisbd_f0c920d4a2887d2d2026-03-07 · +92dVerified

Name: Sierra Management Group
norm: sierra management
Domain: sierramanagementgroup.com
Industry: Business Associate

Name: Sierra Management Group
norm: sierra management
Domain: sierramanagementgroup.com
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 1,279nationwide
Data types: PHIHealth (basic)Identity (basic)
HHS breach type: Hacking / IT incident
Where the data lived: Network server
Covered-entity type: Business associate
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified HHS
Third party: via Sierra Management Groupbusiness associate

Compliance flags: Leak >90dHHS notified
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.
Clock breakdown: Statute Window Elapsed Threshold Status
HIPAA
Discovered: not extracted
→ Notified: not extracted
— regulatory submission HHS notified

Statute	Window	Elapsed	Threshold	Status
HIPAA	Discovered: not extracted → Notified: not extracted	—	regulatory submission	HHS notified

Status: No extraction artifact recorded for this disclosure.

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://ocrportal.hhs.gov/ocr/breach/breach_report.jsf
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Jun 7, 2026
Raw hash: 06246f96c4cda6b303a185a0b329a89103a540521764c68300f9875668934c00

AI-assisted summary above. The structured extract on this page was generated from the document below. Inspect the source to verify or correct any field.

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Linked disclosures

Ransomware claims (1)

Reporting entitySierra Management Group

Victim entitySierra Management Group

IncidentUnauthorized Access

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing