{"id":"CVE-2021-35953","aliases":["EUVD-2021-22588","GHSA-vfmg-gwh5-c67f"],"status":"published","title":"fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows a Remote attacker to cause a...","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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00895,"percentile":0.5996,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2022-12-26T00:00:00Z","modified":"2026-06-17T03:57:59Z","products":[{"vendor":"fastrack","product":"reflex_2.0_firmware"}],"references":[{"url":"https://www.fastrack.in/shop/watch-smart-wearables-reflex-2","tags":["x_transferred","Broken Link"]},{"url":"https://payatu.com/advisory/device-crash-fastrack-reflex-two-activity-tracker","tags":["x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-35953"},{"url":"https://github.com/advisories/GHSA-vfmg-gwh5-c67f"}],"sources":{"cve":[{"id":"CVE-2021-35953","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.","status":"published","published":"2022-12-26T00:00:00Z","modified":"2025-04-14T18:29:40.126Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"updated_at":"2026-11-02T14:33:09.864034Z"}],"euvd":[{"id":"EUVD-2021-22588","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.","status":"published","published":"2022-12-26T00:00:00Z","modified":"2025-04-14T18:29:40Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:32.642133Z"}],"ghsa":[{"id":"GHSA-vfmg-gwh5-c67f","title":"fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows a Remote attacker to cause a...","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.","status":"published","published":"2022-12-26T06:30:22Z","modified":"2023-01-29T05:01:29Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T14:44:50.331765Z"}],"nvd":[{"id":"CVE-2021-35953","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.","status":"published","published":"2022-12-26T06:15:10.457Z","modified":"2026-06-17T03:57:59.713Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"updated_at":"2026-11-02T14:07:07.323379Z"}]}}