---
id: CVE-2026-21138
title: >-
  Insufficient verification of data authenticity in Smart Switch prior to
  version 3.7.73 allows physical attackers to install arbitrary applications.
summary: >-
  Insufficient verification of data authenticity in Smart Switch prior to
  version 3.7.73 allows physical attackers to install arbitrary applications.
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N'
cwe:
  - CWE-345
vendor: Samsung Mobile
product: Smart Switch
affected:
  - smart_switch (all versions)
published: '2026-10-12'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:38.033'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-21138'
references:
  - url: 'https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=10'
    label: mobile.security@samsung.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T17:51:29.277737Z'
cvssSource: cna
epss: 0.00099
epssPercentile: 0.00797
ingestedAt: '2026-10-12T14:50:34.089Z'
---

## Overview

Insufficient verification of data authenticity in Smart Switch prior to version 3.7.73 allows physical attackers to install arbitrary applications.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.