PatchSiren cyber security CVE debrief

CVE-2026-21084 Samsung Mobile CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-10T09:17:22.167Z and has not been modified since then. 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. Evidence is limited to CVE and NVD information. 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.

Vendor: Samsung Mobile
Product: SmartThings
CVSS: MEDIUM 6.9
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-08-10
Original CVE updated: 2026-08-18
Advisory published: 2026-08-10
Advisory updated: 2026-08-18

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.

Sources and references

Verified primary and authoritative sources

CVE-2026-21084 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-21084

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-21084 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21084

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

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.