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National Telehealth Provider Hardens Video Platform and APIs

About the Client

A nationwide telehealth provider delivering virtual visits to 1.8M+ patients annually via WebRTC‑based video, mobile apps, and EHR integrations. The platform began seeing attempts to bypass signaling, hijack sessions, and probe APIs tied to FHIR data and billing flows.The provider engaged Zymr to harden its video platform and critical APIs end‑to‑end.

Key Outcomes

14 Critical (CVSS 9.0+) Vulnerabilities Fixed
98% Threat Detection Coverage Across Telehealth Stack

Business Challenges

Complex real‑time workflows across WebRTC, FHIR, and billing services created multiple potential attack surfaces. Existing controls were fragmented, and logging was inconsistent, making it hard to detect and correlate advanced attack patterns.The provider needed a focused security review that would protect video sessions and patient data without interrupting live care.

Business Impacts / Key Results Achieved

Zymr helped the organization significantly improve its security posture:

  • Identified 14 CVSS 9.0+ issues across video, data sync, and billing APIs
  • Implemented stronger encryption, token handling, and access controls
  • Established HIPAA‑aligned audit logging and API rate limiting
  • Increased detection coverage to 98% on key telehealth attack paths

Strategy and Solutions

End‑to‑End Security Testing

  • Black‑box assessment of login, visit, documentation, and billing flows
  • Targeted tests for signaling bypass, session hijack, and API abuse

Video and Session Security

  • Enforced DTLS‑SRTP and hardened signaling infrastructure
  • Implemented token binding and strict session lifetime policies

API and Data Protection

  • Introduced API rate limiting and abuse detection
  • Standardized audit logging on FHIR and billing endpoints for compliance and monitoring

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