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CVE-2026-5768— Fourth Frontier Frontier X Mobile Application, Frontier X2 Missing Authentication for Critical Function

Quick assessment

Affected
Fourth Frontier Frontier X Android application
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Frontier是一个 Substrate 的以太坊兼容层。用于运行未经修改的以太坊 Dapp。 Frontier X2存在访问控制错误漏洞，该漏洞源于未强制配对认证或授权允许未认证BLE读写关键GATT特征，可能导致攻击者执行未授权控制包括启动停止活动、触发振动、拒绝服务以及注入虚假健康遥测数据。

CVSS 8.8 · High EPSS 0.43% · P36

Affected Version Matrix 3

VendorProduct Version RangeStatus
Fourth Frontier Frontier X Android application < 15.0.0 affected
Fourth Frontier Frontier X IOS application < 25.0.0 affected
Fourth Frontier Frontier X2 All versions affected
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I. Basic Information for CVE-2026-5768

Vulnerability Information
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Vulnerability Title
Fourth Frontier Frontier X Mobile Application, Frontier X2 Missing Authentication for Critical Function
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Frontier 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Frontier是一个 Substrate 的以太坊兼容层。用于运行未经修改的以太坊 Dapp。 Frontier X2存在访问控制错误漏洞，该漏洞源于未强制配对认证或授权允许未认证BLE读写关键GATT特征，可能导致攻击者执行未授权控制包括启动停止活动、触发振动、拒绝服务以及注入虚假健康遥测数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Fourth Frontier Frontier X Android application 0 ~ 15.0.0 -
Fourth Frontier Frontier X IOS application 0 ~ 25.0.0 -
Fourth Frontier Frontier X2 All versions -

II. Public POCs for CVE-2026-5768

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III. Intelligence Information for CVE-2026-5768

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Vendor Advisories for CVE-2026-5768 (2)

IV. Related Vulnerabilities

Same weakness: CWE-306