How severe is CVE-2021-25424?

CVE-2021-25424 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-25424 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25424?

CVE-2021-25424 primarily affects Samsung Galaxy Watch Active 2 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-25424?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-25424 published?

CVE-2021-25424 was published on 2021-06-11 and last updated on 2026-06-17.

CVE-2021-25424

CVE-2021-25424 is a high-severity vulnerability in Samsung Galaxy Watch Active 2 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 5.8
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Samsung Galaxy Watch Active 2 Firmware
Published: 2021-06-11
Last modified: 2026-06-17

Description

Improper authentication vulnerability in Tizen bluetooth-frwk prior to Firmware update JUN-2021 Release allows bluetooth attacker to take over the user's bluetooth device without user awareness.

Frequently asked questions

What is CVE-2021-25424?: Improper authentication vulnerability in Tizen bluetooth-frwk prior to Firmware update JUN-2021 Release allows bluetooth attacker to take over the user's bluetooth device without user awareness.
How severe is CVE-2021-25424?: CVE-2021-25424 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-25424 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25424?: CVE-2021-25424 primarily affects Samsung Galaxy Watch Active 2 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-25424?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-25424 published?: CVE-2021-25424 was published on 2021-06-11 and last updated on 2026-06-17.

References

https://security.samsungmobile.com/serviceWeb.smsb?year=2021&month=6

Affected products (9)

cpe:2.3:o:samsung:galaxy_watch_active_2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:samsung:galaxy_watch_active_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:samsung:galaxy_watch_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:samsung:galaxy_watch_3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:samsung:gear_s3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:samsung:gear_s2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:samsung:gear_s_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:samsung:gear_2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:samsung:gear_2_neo_firmware:*:*:*:*:*:*:*:*

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