CVE-2026-21084 Samsung Mobile CVE debrief

Who should care

Users of SmartThings prior to version 1.8.47.24 should update to the latest version to prevent local attackers from accessing sensitive information. This includes operators managing SmartThings deployments, platform administrators, vulnerability management teams, and security teams responsible for monitoring and defending these assets. Ensure that local access controls are verified and that monitoring is in place to detect potential exploitation attempts within the affected deployments.

Technical summary

CVE-2026-21084 is a MEDIUM severity vulnerability due to improper access control in SmartThings prior to version 1.8.47.24, allowing local attackers to access sensitive information. The vulnerability impacts SmartThings deployments where local access is possible. Defenders should focus on limiting local access and monitoring for suspicious activity. Technical details are limited to CVE and NVD information.

Defensive priority

Local attackers may access sensitive information; verify and limit local access.

Recommended defensive actions

• Verify and limit local access to sensitive information
• Update SmartThings to version 1.8.47.24 or later
• Monitor for suspicious local activity

Evidence notes

CVE-2026-21084 has a CVSS score of 6.9 and is classified as MEDIUM severity. The vulnerability is due to improper access control in SmartThings prior to version 1.8.47.24. Evidence is limited to CVE and NVD information. Defenders should verify local access controls and monitor for suspicious activity within the affected SmartThings deployments. Additional information from Samsung Mobile may be required for thorough risk assessment.

Official resources