High severity7.5NVD Advisory· Published Dec 26, 2022· Updated Jun 17, 2026
CVE-2021-35951
CVE-2021-35951
Description
fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows an Unauthenticated Remote attacker to send a malicious firmware update via BLE and brick the device.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- fastrack/Reflex 2.0 W307S_REFLEX_v90.89 Activity Trackerdescription
- Range: v90.89
Patches
Vulnerability mechanics
References
2- payatu.com/advisory/fastrack-reflex-unauthenticated-firmware-updatenvdThird Party Advisory
- www.fastrack.in/shop/watch-smart-wearables-reflex-2nvdPermissions Required
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