PatchSiren cyber security CVE debrief
CVE-2026-21138 Samsung Mobile CVE debrief
CVE-2026-21138 is a medium-severity vulnerability in Smart Switch that allows physical attackers to install arbitrary applications due to insufficient verification of data authenticity. This issue affects Smart Switch deployments prior to version 3.7.73. Defenders responsible for physical security, application control, and Smart Switch deployments should assess exposure and prioritize remediation. The vulnerability has a medium CVSS score of 6.9, indicating moderate risk. The CVE record was published on 2026-10-12T04:57:56.938Z and has not been modified since then.
- Vendor
- Samsung Mobile
- Product
- Smart Switch
- CVSS
- MEDIUM 6.9
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-10-12
- Original CVE updated
- 2026-10-12
- Advisory published
- 2026-10-12
- Advisory updated
- 2026-10-12
Who should care
Defenders responsible for physical security, application control, and Smart Switch deployments should assess exposure and prioritize remediation.
Why it matters
CVE-2026-21138 is a medium-severity vulnerability in Smart Switch that allows physical attackers to install arbitrary applications due to insufficient verification of data authenticity. Defenders should prioritize remediation, especially those responsible for physical security and application control.
- Physical attackers can install arbitrary applications
- Insufficient verification of data authenticity
- Medium CVSS score of 6.9 indicates moderate risk
Technical summary
Insufficient verification of data authenticity in Smart Switch prior to version 3.7.73 allows physical attackers to install arbitrary applications. This vulnerability affects Smart Switch deployments and has a medium CVSS score of 6.9, indicating moderate risk. Defenders should verify Smart Switch version and upgrade to 3.7.73 or later to mitigate this vulnerability. The official CVE Program and NVD records confirm this vulnerability.
Defensive priority
Medium priority for physical security and application control
Recommended defensive actions
- Verify Smart Switch version and upgrade to 3.7.73 or later
- Implement physical security controls to prevent unauthorized access
- Monitor application installations and enforce strict control
Evidence notes
Official CVE Program and NVD records confirm insufficient verification of data authenticity in Smart Switch prior to version 3.7.73, allowing physical attackers to install arbitrary applications.
Sources and references
Verified primary and authoritative sources
-
CVE-2026-21138 CVE Program record
Publisher, destination, and source semantics verified
URL: https://www.cve.org/CVERecord?id=CVE-2026-21138
CVE Program - Official CVE Program record with source-provided CVE metadata.
-
CVE-2026-21138 NVD vulnerability detail
Publisher, destination, and source semantics verified
URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21138
NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.
Supplemental references
-
CVE-2026-21138
Unverified legacy reference
URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21138.json
cve_program_cvelist_v5
Methodology and review provenance
AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.