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MEDIUM · 5.4

CVE-2025-20939

Improper authorization in wireless download protocol in Galaxy Watch prior to SMR Apr-2025 Release 1 allows physical attackers to update device unique identifier of Watch devices.

Vulnerability Description

Improper authorization in wireless download protocol in Galaxy Watch prior to SMR Apr-2025 Release 1 allows physical attackers to update device unique identifier of Watch devices.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
LOW

Affected Products

VendorProductVersions
SamsungWear Os5.0
SamsungGalaxy Watch-
SamsungGalaxy Watch 4-
SamsungGalaxy Watch 4 Classic-
SamsungGalaxy Watch 5-
SamsungGalaxy Watch 5 Pro-
SamsungGalaxy Watch 6-
SamsungGalaxy Watch 6 Classic-
SamsungGalaxy Watch 7-
SamsungGalaxy Watch Fe-
SamsungGalaxy Watch Ultra-

References

FAQ

What is CVE-2025-20939?

CVE-2025-20939 is a vulnerability with a CVSS score of 5.4 (MEDIUM). Improper authorization in wireless download protocol in Galaxy Watch prior to SMR Apr-2025 Release 1 allows physical attackers to update device unique identifier of Watch devices.

How severe is CVE-2025-20939?

CVE-2025-20939 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-20939?

Check the references section above for vendor advisories and patch information. Affected products include: Samsung Wear Os, Samsung Galaxy Watch, Samsung Galaxy Watch 4, Samsung Galaxy Watch 4 Classic, Samsung Galaxy Watch 5.