CVE-2021-35954

high

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.

References

https://www.fastrack.in/shop/watch-smart-wearables-reflex-2

https://payatu.com/advisory/dumping-and-re-flashing-firmware-fastrack-reflex

Details

Source: Mitre, NVD

Published: 2022-12-26

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H