CVE-2026-21137 Samsung Mobile CVE debrief

Who should care

Defenders responsible for managing and securing Samsung Mobile Smart Switch installations should verify and apply the patch to prevent physical attackers from accessing sensitive files.

Why it matters

CVE-2026-21137 is a path traversal vulnerability in Samsung Mobile's Smart Switch prior to version 3.7.73. Physical attackers can exploit this to access files with Smart Switch privileges. Defenders should verify and apply the patch, restrict physical access, and monitor for suspicious file access attempts.

• Physical attackers can access files with Smart Switch privileges
• Verify Smart Switch version and apply patch if necessary
• Restrict physical access to Smart Switch devices

Technical summary

CVE-2026-21137 is a path traversal vulnerability in Samsung Mobile's Smart Switch prior to version 3.7.73. An attacker with physical access can exploit this vulnerability to access files with Smart Switch privileges. This could allow the attacker to read or write files on the affected system, potentially leading to unauthorized data access or modification. The vulnerability is due to improper input validation, which allows an attacker to traverse the file system and access sensitive files. Defenders should verify and apply the vendor-provided patch for Smart

Defensive priority

Verify and apply the vendor-provided patch for Smart Switch version 3.7.73 or later.

Recommended defensive actions

• Verify Smart Switch version and apply patch if necessary
• Restrict physical access to Smart Switch devices
• Monitor for suspicious file access attempts

Evidence notes

The CVE record and source item provide details on the path traversal vulnerability in Smart Switch. However, additional information on potential exploitation or impact is limited.

Sources and references

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.