CVE-2021-35954 - Vulnerability Details - OpenCVE

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.

Published: 2022-12-26

Score: 8.1 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

AND

cpe:2.3:o:fastrack:reflex_2.0_firmware:90.89:*:*:*:*:*:*:*

cpe:2.3:h:fastrack:reflex_2.0:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-22589	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.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00095.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://payatu.com/advisory/dumping-and-re-flashing-firmware-fastrack-reflex
https://www.fastrack.in/shop/watch-smart-wearables-reflex-2

History

Mon, 14 Apr 2025 19:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Fastrack Reflex 2.0 Reflex 2.0 Firmware

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2022-12-26T00:00:00.000Z

Updated: 2025-04-14T18:29:00.391Z

Reserved: 2021-06-29T00:00:00.000Z

Link: CVE-2021-35954

Vulnrichment

Updated: 2024-08-04T00:47:42.622Z

NVD

Status : Modified

Published: 2022-12-26T06:15:10.507

Modified: 2025-04-14T19:15:30.383

Link: CVE-2021-35954

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

NVD-CWE-noinfo

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-35954", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2025-04-14T18:29:00.391Z", "dateReserved": "2021-06-29T00:00:00.000Z", "datePublished": "2022-12-26T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2022-12-26T00:00:00.000Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://www.fastrack.in/shop/watch-smart-wearables-reflex-2"}, {"url": "https://payatu.com/advisory/dumping-and-re-flashing-firmware-fastrack-reflex"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T00:47:42.622Z"}, "title": "CVE Program Container", "references": [{"url": "https://www.fastrack.in/shop/watch-smart-wearables-reflex-2", "tags": ["x_transferred"]}, {"url": "https://payatu.com/advisory/dumping-and-re-flashing-firmware-fastrack-reflex", "tags": ["x_transferred"]}]}, {"problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-04-14T18:28:52.249487Z", "id": "CVE-2021-35954", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-14T18:29:00.391Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://www.fastrack.in/shop/watch-smart-wearables-reflex-2", "tags": ["x_transferred"]}, {"url": "https://payatu.com/advisory/dumping-and-re-flashing-firmware-fastrack-reflex", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T00:47:42.622Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2021-35954", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-04-14T18:28:52.249487Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-14T14:42:58.960Z"}}], "cna": {"affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "references": [{"url": "https://www.fastrack.in/shop/watch-smart-wearables-reflex-2"}, {"url": "https://payatu.com/advisory/dumping-and-re-flashing-firmware-fastrack-reflex"}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "text", "description": "n/a"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2022-12-26T00:00:00.000Z"}}}, "cveMetadata": {"cveId": "CVE-2021-35954", "state": "PUBLISHED", "dateUpdated": "2025-04-14T18:29:00.391Z", "dateReserved": "2021-06-29T00:00:00.000Z", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "datePublished": "2022-12-26T00:00:00.000Z", "assignerShortName": "mitre"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fastrack:reflex_2.0_firmware:90.89:*:*:*:*:*:*:*", "matchCriteriaId": "EE456490-17F2-47BD-81AD-ECFDC8407571", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:fastrack:reflex_2.0:-:*:*:*:*:*:*:*", "matchCriteriaId": "9BE152C4-4620-4FDB-A819-DB77BA3C587E", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker permite a atacantes f\u00edsicamente pr\u00f3ximos volcar el firmware, flashear firmware malicioso personalizado y bloquear el dispositivo mediante la funci\u00f3n Serial Wire Debug (SWD)."}], "id": "CVE-2021-35954", "lastModified": "2025-04-14T19:15:30.383", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2022-12-26T06:15:10.507", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://payatu.com/advisory/dumping-and-re-flashing-firmware-fastrack-reflex"}, {"source": "cve@mitre.org", "tags": ["Broken Link", "Product"], "url": "https://www.fastrack.in/shop/watch-smart-wearables-reflex-2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://payatu.com/advisory/dumping-and-re-flashing-firmware-fastrack-reflex"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Product"], "url": "https://www.fastrack.in/shop/watch-smart-wearables-reflex-2"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}