High severity8.1NVD Advisory· Published Dec 26, 2022· Updated Jun 17, 2026
CVE-2021-35954
CVE-2021-35954
Description
fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows physically proximate attackers to dump the firmware, flash custom malicious firmware, and brick the device via the Serial Wire Debug (SWD) feature.
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Affected products
2- fastrack/Reflex 2.0 W307S_REFLEX_v90.89 Activity Trackerdescription
- Range: v90.89
Patches
Vulnerability mechanics
References
2- payatu.com/advisory/dumping-and-re-flashing-firmware-fastrack-reflexnvdThird Party Advisory
- www.fastrack.in/shop/watch-smart-wearables-reflex-2nvdBroken LinkProduct
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