CVE-2026-5768
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Frontier X2 device exposes critical GATT characteristics without BLE pairing authentication, allowing attackers within radio range to control device functions (activity tracking, vibrations) and cause denial of service. Separately, the Frontier X mobile application fails to authenticate the BLE device, enabling attackers to impersonate a legitimate device by cloning BLE advertisements and injecting fake health telemetry (heart rate, breathing rate, strain) into the application.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Frontier X2 deviceCheck your device model number or packaging for 'Frontier X2' branding, or query the BLE device name advertised via BLE scanAffected if The device is a Frontier X2 and BLE is enabled
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Verify BLE pairing requirementUsing a BLE analysis tool (such as nRF Connect or BLEah), attempt to connect to the device and read GATT characteristic values without completing a pairing/bonding processAffected if You can read or write GATT characteristics without first establishing a paired connection
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Check critical GATT characteristic accessEnumerate GATT services on the device and attempt to access characteristics related to activity control, vibration, or device control without authenticationAffected if Characteristics controlling device functions are accessible without pairing authentication
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Inspect companion app telemetry injectionMonitor BLE traffic between the device and companion mobile app using a BLE sniffer; observe whether the app accepts health telemetry (breathing rate, heart rate, strain) without verifying device identity beyond advertisement dataAffected if The mobile app accepts and displays health data from a device that cannot be cryptographically verified as the legitimate Frontier X2
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Compare firmware versionCheck device firmware version through BLE service data, companion app device info, or device settings menuAffected if The installed firmware version falls within the affected range (Frontier X2 firmware prior to patched release)
You are affected if you use a Frontier X2 device with BLE enabled and can access its GATT characteristics or inject telemetry without device authentication being required.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement BLE pairing/bonding with authentication on the device firmware, and add cryptographic device identity verification in the mobile application to prevent impersonation attacks.
- Consultation6.0 h
- Implementation32.0 h
- Testing12.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $15,744.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-5768 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-5768 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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