CVE-2026-9220 Overview
CVE-2026-9220 affects the Setracker2 Android companion application (com.tgelec.setracker) in versions 3.1.5 and prior. The app encrypts traffic between the smartwatch and its backend using static hardcoded Advanced Encryption Standard (AES) keys and initialization vectors (IVs). An attacker who extracts these values from the application binary can decrypt intercepted Setracker2 watch traffic. The weakness is classified under [CWE-321: Use of Hard-coded Cryptographic Key].
Critical Impact
Attackers who capture Setracker2 network traffic can decrypt watch-to-backend communications, exposing location data, device identifiers, and account information transmitted by wearable devices, many of which are marketed for child tracking.
Affected Products
- Setracker2 Android companion app com.tgelec.setracker version 3.1.5
- Setracker2 Android companion app com.tgelec.setracker versions prior to 3.1.5
- Smartwatches paired with the Setracker2 backend service
Discovery Timeline
- 2026-06-26 - CVE-2026-9220 published to NVD
- 2026-06-26 - Last updated in NVD database
Technical Details for CVE-2026-9220
Vulnerability Analysis
The Setracker2 companion app embeds AES symmetric keys and IVs directly in the application package. Because the same keys ship with every installation, the cryptographic material is neither secret nor unique per device. Any party with access to the APK can extract the values through static analysis using tools such as jadx, apktool, or Ghidra.
Once the keys are recovered, an attacker capturing network traffic between the watch, the phone, and the vendor backend can decrypt the ciphertext at rest or in transit. This exposes telemetry that typically includes GPS coordinates, IMEI identifiers, phone numbers, and account credentials. The vulnerability follows the [CWE-321] weakness pattern and reflects a broader class of design flaws common in low-cost Internet of Things (IoT) wearables.
Root Cause
The root cause is the storage of long-lived symmetric cryptographic material inside the client application. The design assumes obfuscation provides confidentiality. Static keys shared across every installation defeat the confidentiality guarantee that AES is intended to provide. Proper implementations rely on per-session keys negotiated through Transport Layer Security (TLS) or an asymmetric handshake.
Attack Vector
An attacker performs three steps. First, they extract com.tgelec.setracker from an Android device or public APK mirror and recover the hardcoded AES key and IV. Second, they capture Setracker2 traffic through a hostile Wi-Fi network, a compromised upstream router, or passive collection near the target. Third, they decrypt captured payloads offline using the extracted key material, revealing location history and account data. No authentication or user interaction is required against the target device.
No public proof-of-concept exploit code is published for this specific CVE. Refer to the CISA CSAF Document for the official technical description.
Detection Methods for CVE-2026-9220
Indicators of Compromise
- Presence of the com.tgelec.setracker package version 3.1.5 or earlier on enrolled Android devices.
- Outbound connections from mobile devices to Setracker2 backend endpoints over unencrypted or weakly encrypted channels.
- Unexpected packet captures or man-in-the-middle proxies observed on networks carrying Setracker2 traffic.
Detection Strategies
- Inventory managed Android devices for installations of com.tgelec.setracker and record the installed version via mobile device management (MDM).
- Perform static analysis of the APK to confirm the presence of embedded AES keys and IVs in the DEX bytecode or native libraries.
- Monitor for anomalous traffic patterns from wearable-associated mobile applications, including replayed or malformed encrypted payloads.
Monitoring Recommendations
- Alert on installations of the vulnerable package on corporate-managed handsets.
- Log DNS queries and network flows to Setracker2 backend domains to identify affected user populations.
- Track guest and BYOD Wi-Fi segments for passive interception tooling that could target IoT traffic.
How to Mitigate CVE-2026-9220
Immediate Actions Required
- Discontinue use of Setracker2 companion app versions 3.1.5 and prior on sensitive networks until a fixed release is confirmed by the vendor.
- Remove the com.tgelec.setracker application from corporate and family-managed devices where alternate tracking solutions are available.
- Rotate any credentials, phone numbers, or account identifiers previously transmitted through the affected application.
Patch Information
No vendor-supplied patch is referenced in the CVE record at publication time. Consult the CISA CSAF Document and the vendor's support channels for updated firmware or application releases addressing the hardcoded key issue.
Workarounds
- Restrict watch usage to trusted network segments that do not traverse untrusted Wi-Fi or cellular infrastructure controlled by third parties.
- Route mobile device traffic through a corporate virtual private network (VPN) to reduce opportunities for passive traffic capture.
- Replace vulnerable devices with wearables that use per-session key negotiation and certificate-pinned TLS for backend communication.
# Query Android MDM inventory for vulnerable Setracker2 installations
adb shell pm list packages | grep com.tgelec.setracker
adb shell dumpsys package com.tgelec.setracker | grep versionName
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
