Auth bypass in Samsung Smart Switch
CVE-2026-21004
Improper authentication in Smart Switch prior to version 3.7.69.15 allows adjacent attackers to trigger a denial of service.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Samsung Smart Switch
- Samsung Mobile Smart Switch — versions 3.7.69.15
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.samsungmobile.com/serviceWeb.smsb (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-21004?
- CVE-2026-21004 is a medium-severity vulnerability in Samsung Smart Switch, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-03-16.
- How severe is CVE-2026-21004?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2026-21004 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.