CVE-2026-5768
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
The Frontier X2 device allows unauthenticated BLE read/write access to critical GATT characteristics without pairing or authorization. Attackers within BLE range can take control, and the Frontier X app lacks device authentication, allowing impersonation and injection of fake health telemetry (e.g., heart rate, breathing rate).
Risk Assessment
Attackers can remotely control the device, cause denial of service, or inject false health data into the mobile app, potentially leading to incorrect medical diagnoses.
Recommendation
Update the Frontier X2 firmware and Frontier X app to patched versions. Implement BLE authentication.
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Original NVD description (English source)
The Frontier X2 device allows unauthenticated BLE read/write access to critical GATT characteristics without enforcing pairing authentication or authorization. This allows attackers within BLE range to perform unauthorized control of device functions, including starting/stopping activities, triggering vibrations, causing denial-of-service conditions, and fuzzing characteristic values to induce unexpected behavior. Additionally, the Frontier X mobile application lacks proper BLE device authentication, allowing attackers to impersonate a legitimate Frontier X2 device and connect to the application. By cloning BLE advertisements and exposing expected GATT characteristics, attackers can manipulate activity states and inject fabricated health telemetry such as breathing rate, heart rate, strain, and other health-related data into the mobile application.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

