CVE-2025-20939

MEDIUMNVD 5.45.4—

5.4

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 v3: 5.4
EG Score: 5.4(medium)
EPSS: 5.2%
KEV: Not listed

Published

April 8, 2025

Last Modified

January 27, 2026

References (1)

mobilehttps://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=04

Data Freshness Timeline

(refreshed 11× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-22 14:25 UTCEPSS rescore
2026-06-22 14:25 UTCEPSS rescore
2026-06-21 14:56 UTCEPSS rescore
2026-06-21 14:56 UTCEPSS rescore
2026-06-21 01:59 UTCEPSS rescore
2026-06-21 01:59 UTCEPSS rescore
2026-06-19 19:25 UTCEPSS rescore
2026-06-19 19:25 UTCEPSS rescore
2026-06-18 17:52 UTCEPSS rescore
2026-06-18 17:52 UTCEPSS rescore
2026-06-17 17:52 UTCEPSS rescore
2026-06-16 17:52 UTCEPSS rescore
2026-06-15 17:48 UTCEPSS rescore
2026-06-14 23:17 UTCEPSS rescore
2026-06-13 22:59 UTCEPSS rescore
2026-06-13 22:59 UTCEPSS rescore
2026-06-12 23:11 UTCEPSS rescore
2026-06-11 13:59 UTCEPSS rescore
2026-06-10 22:18 UTCEPSS rescore
2026-06-10 13:21 UTCEPSS rescore
2026-06-08 14:16 UTCEPSS rescore
2026-06-08 14:16 UTCEPSS rescore
2026-06-07 15:24 UTCEPSS rescore
2026-06-06 13:47 UTCEPSS rescore
2026-06-06 13:47 UTCEPSS rescore

Show 15 more

2026-06-05 22:46 UTCEPSS rescore
2026-06-05 22:46 UTCEPSS rescore
2026-06-05 06:10 UTCEPSS rescore
2026-06-05 06:10 UTCEPSS rescore
2026-06-04 13:11 UTCEPSS rescore
2026-06-04 13:11 UTCEPSS rescore
2026-06-02 20:12 UTCEPSS rescore
2026-06-02 20:12 UTCEPSS rescore
2026-06-01 13:51 UTCEPSS rescore
2026-06-01 13:51 UTCEPSS rescore
2026-05-31 22:30 UTCEPSS rescore
2026-05-31 22:30 UTCEPSS rescore
2026-05-30 07:58 UTCEG score recompute
2026-05-30 07:58 UTCGHSA enrichment
2026-05-29 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-20939?

CVE-2025-20939 is a medium vulnerability published on April 8, 2025. 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.

When was CVE-2025-20939 disclosed?

CVE-2025-20939 was first published in the National Vulnerability Database on April 8, 2025, with the most recent update on January 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-20939 actively exploited?

CVE-2025-20939 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-20939?

CVE-2025-20939 has a CVSS v3 base score of 5.4 (NVD).

How do I remediate CVE-2025-20939?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-20939, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2025-20939

Explore →

Is Your Infrastructure Affected by CVE-2025-20939?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2025-20939

📅 Published

🔄 Last Modified

🔗 References (1)