--- title: "Park Dental Partners network data incident" description: "Park Dental Partners confirmed patient-data acquisition following an August 2026 network intrusion and reported related class-action litigation." incident_type: "Cybersecurity incident" status: "active" last_modified: "2026-10-14" canonical_url: "https://www.ally.security/incidents/park-dental-partners-network-data-incident-2026" markdown_url: "https://www.ally.security/incidents/park-dental-partners-network-data-incident-2026.md" stix_url: "https://www.ally.security/incidents/park-dental-partners-network-data-incident-2026/stix.json" --- # Park Dental Partners network data incident An October filing confirmed patient-data acquisition and ongoing notifications after the company’s initial September disclosure. Last modified Oct 14, 2026 · 2 sources ## Summary - **Environment:** Park Dental Partners computer network - **Operational impact:** Initial filing reported no material disruption to business operations - **Financial impact:** No incident cost established in the reviewed evidence ## What happened [Park Dental Partners](https://investors.parkdentalpartners.com/) detected unauthorized network access on August 28, 2026. Its [October 13 filing](https://www.sec.gov/Archives/edgar/data/2069604/000110465926115541/park-20261007x8k.htm) confirmed acquisition of data, including patient protected health information. [1](#source-1) ## Impact Patient notifications were being completed. The filing gives no affected-person total or detailed data-field inventory. It reports four putative class actions and no identified material financial or operating-results impact as of October 13. [1](#source-1) ## Timeline ### August 28, 2026 — Unauthorized access detected The company detected the network intrusion. [1](#source-1) ### September 1, 2026 — Initial disclosure The [initial filing](https://www.sec.gov/Archives/edgar/data/2069604/000110465926104300/park-20260828x8k.htm) reported no material disruption to business operations. [2](#source-2) ### October 7, 2026 — Consolidation requested Plaintiffs sought consolidation and interim lead class counsel. This was a motion, not a court finding of liability. [1](#source-1) ### October 13, 2026 — Data acquisition confirmed The updated filing confirmed patient-data impact and ongoing notices. [1](#source-1) ### October 14, 2026 — Briefing updated This briefing was last reviewed and updated on October 14, 2026. ## Threat Group & Attack Vector The filings do not establish an entry method or attribute the intrusion. [1](#source-1) ### Actors - No threat actor group has been identified in the reviewed public evidence. ### TTPs - No specific MITRE ATT\&CK technique is currently mapped for this case. ## Response The company activated incident response, retained cybersecurity and forensic specialists, and notified law enforcement. [1](#source-1) ## Assets [Download the case-scoped STIX 2.1 bundle]() ## Sources Primary source records used to research this incident. ### Park Dental Partners Form 8-K — acquisition of patient data and litigation update regulatory · Park Dental Partners, Inc. · Oct 13, 2026 ### Park Dental Partners Form 8-K — August network intrusion regulatory · Park Dental Partners, Inc. · Sep 1, 2026
Evidence ledger Review the supporting structured claims. 1. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: The company activated incident response, retained external cybersecurity and forensic specialists, and notified law enforcement. 2. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: Park Dental Partners identified unauthorized access to its computer network on August 28, 2026. 3. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: As of October 13, the company had not identified a material impact on its financial condition or results of operations; that assessment included its then-current view of legal and adviser costs. 4. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: The October filing reported four putative class actions in Ramsey County, Minnesota, and an October 7 motion to consolidate and appoint interim lead class counsel; it did not report an order granting that motion. 5. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: Patient-data acquisition confirmed 6. **Resulted In · 100% confidence · current** Initial disclosure filed: The company filed its initial Form 8-K while investigating scope. 7. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: Plaintiffs seek consolidation 8. **Resulted In · 100% confidence · current** Patient-data acquisition confirmed: An updated filing confirmed data acquisition and ongoing patient notifications. 9. **Occurred At · 100% confidence · current** Network intrusion detected: 2026-08-28 10. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: The September 1 filing said the incident had not materially disrupted business operations. 11. **Resulted In · 100% confidence · current** Network intrusion detected: Park Dental Partners detected unauthorized network access. 12. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: Its October 13 filing confirmed unauthorized acquisition of data, including patient protected health information, and said patient notifications were being completed. 13. **Disclosed At · 100% confidence · current** Park Dental Partners network data breach: 2026-09-01 14. **Affected Organization · 100% confidence · current** Park Dental Partners network data breach: Park Dental Partners, Inc. 15. **Resulted In · 100% confidence · current** Plaintiffs seek consolidation: Plaintiffs moved to consolidate four putative class actions; this is a motion, not a liability finding. 16. **Discovered At · 100% confidence · current** Park Dental Partners network data breach: 2026-08-28 17. **Occurred At · 100% confidence · current** Initial disclosure filed: 2026-09-01 18. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: Initial disclosure filed 19. **Resulted In · 100% confidence · current** Park Dental Partners network data breach: Network intrusion detected 20. **Occurred At · 100% confidence · current** Plaintiffs seek consolidation: 2026-10-07 21. **Occurred At · 100% confidence · current** Patient-data acquisition confirmed: 2026-10-13