What is CVE-2025-20939?

CVE-2025-20939 is a medium-severity vulnerability in Samsung Galaxy_watch, classified under CWE-347 IMPROPER VERIFICATION OF CRYPTOGRAPHIC SIGNATURE. CVSS score: 5.4/10. Published 2025-04-08.

How severe is CVE-2025-20939?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Samsung Galaxy_watch

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.

EPSS: 0.002 (5.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L.

Affected products

Samsung Galaxy_watch
Samsung Galaxy_watch_4
Samsung Galaxy_watch_4_classic
Samsung Galaxy_watch_5
Samsung Galaxy_watch_5_pro
Samsung Galaxy_watch_6
Samsung Galaxy_watch_6_classic
Samsung Galaxy_watch_7
Samsung Galaxy_watch_fe
Samsung Galaxy_watch_ultra

References

mobile.security@samsung.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-20939?: CVE-2025-20939 is a medium-severity vulnerability in Samsung Galaxy_watch, classified under CWE-347 IMPROPER VERIFICATION OF CRYPTOGRAPHIC SIGNATURE. CVSS score: 5.4/10. Published 2025-04-08.
How severe is CVE-2025-20939?: Medium severity. CVSS v3 base score is 5.4 out of 10.