How severe is CVE-2021-35952?

CVE-2021-35952 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-35952 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35952?

CVE-2021-35952 affects Fastrack Reflex 2.0 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-35952?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-35952 published?

CVE-2021-35952 was published on 2022-12-26 and last updated on 2026-06-17.

CVE-2021-35952

CVE-2021-35952 is a medium-severity vulnerability in Fastrack Reflex 2.0 Firmware with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Fastrack Reflex 2.0 Firmware
Published: 2022-12-26
Last modified: 2026-06-17

Description

fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows a Remote attacker to change the time, date, and month via Bluetooth LE Characteristics on handle 0x0017.

Frequently asked questions

What is CVE-2021-35952?: fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows a Remote attacker to change the time, date, and month via Bluetooth LE Characteristics on handle 0x0017.
How severe is CVE-2021-35952?: CVE-2021-35952 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-35952 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35952?: CVE-2021-35952 affects Fastrack Reflex 2.0 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-35952?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-35952 published?: CVE-2021-35952 was published on 2022-12-26 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Fastrack Reflex 2.0 Firmware

CVE-2021-35954 — High (CVSS 8.1): fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows physically proximate attackers to dump the firmware,…
CVE-2021-35953 — High (CVSS 7.5): fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows a Remote attacker to cause a Denial of Service (device…
CVE-2021-35951 — High (CVSS 7.5): fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker allows an Unauthenticated Remote attacker to send a malicious…

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