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CVE-2026-21136 Samsung Mobile CVE debrief

CVE-2026-21136 is a medium-severity vulnerability in Samsung Mobile's Smart Switch software prior to version 3.7.73. The issue allows physical attackers to invoke the application restore process due to improper authorization. This debrief provides an analysis based on the CVE Program record and other official sources. Affected product deployments should be identified in managed environments, and owners should be assigned for follow-up. The vulnerability class involves improper authorization, which could lead to potential data exposure or manipulation during the restore process. Source-confidence limits are based on official CVE Program and vendor advisories.

Vendor
Samsung Mobile
Product
Smart Switch
CVSS
MEDIUM 6.8
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 Samsung Smart Switch installations should assess exposure and prioritize upgrading to version 3.7.73 or later. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify Smart Switch installations and implement compensating controls for sensitive data. Affected systems should be reviewed for potential data exposure or manipulation,

Why it matters

CVE-2026-21136 is a medium-severity vulnerability in Samsung Mobile's Smart Switch software prior to version 3.7.73. The issue allows physical attackers to invoke the application restore process due to improper authorization. Defenders should prioritize verifying exposure and upgrading to version 3.7.73 or later.

  • Physical attackers can invoke application restore process
  • Potential data exposure or manipulation during restore process
  • Requires verification of Smart Switch installations and upgrade to version 3.7.73 or later

Technical summary

CVE-2026-21136 is a medium-severity vulnerability in Samsung Mobile's Smart Switch software prior to version 3.7.73. The issue allows physical attackers to invoke the application restore process due to improper authorization. This vulnerability affects Smart Switch installations, and defenders should prioritize verifying exposure and upgrading to version 3.7.73 or later. The vulnerability's technical framing involves improper authorization in the application restore process, which could lead to potential data exposure or manipulation.

Defensive priority

Defenders should prioritize verifying exposure of Smart Switch installations and upgrading to version 3.7.73 or later.

Recommended defensive actions

  • Verify Smart Switch installations and upgrade to version 3.7.73 or later
  • Monitor for physical access to affected systems
  • Implement compensating controls for sensitive data

Evidence notes

The CVE Program record and Samsung Mobile's advisory confirm the vulnerability in Smart Switch prior to version 3.7.73. Physical attackers can exploit improper authorization to invoke the application restore process.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21136 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21136

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-21136 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21136

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • CVE-2026-21136

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21136.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.