What’s Vulnerable › Vulnerabilities

CVE-2021-35953

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-26 · updated 2026-06-17

Description

fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows a Remote attacker to cause a Denial of Service (device outage) via crafted choices of the last three bytes of a characteristic value.

Affected products

• Fastrack Reflex 2.0 Firmware: 90.89

References

• https://payatu.com/advisory/device-crash-fastrack-reflex-two-activity-tracker
• https://www.fastrack.in/shop/watch-smart-wearables-reflex-2
• https://payatu.com/advisory/device-crash-fastrack-reflex-two-activity-tracker
• https://www.fastrack.in/shop/watch-smart-wearables-reflex-2

Get alerted when CVE-2021-35953 or the next vulnerability affects your stack