CVE-2026-21053 Samsung Mobile CVE debrief

Who should care

Users of Samsung Email prior to version 6.2.13.1 should verify their application version and update if necessary. This includes administrators and users who have Samsung Email installed on their devices. Additionally, security teams and vulnerability management teams should be aware of this vulnerability and take necessary precautions.

Technical summary

The vulnerability is caused by improper input validation in Samsung Email prior to version 6.2.13.1. This allows local attackers to create arbitrary files within the application sandbox. The vulnerability has a CVSS score of 5.1 and a severity of MEDIUM. Users of Samsung Email should verify their application version and update if necessary.

Defensive priority

Medium priority due to the local attack vector and potential for arbitrary file creation.

Recommended defensive actions

• Verify and update Samsung Email to version 6.2.13.1 or later
• Implement local access controls and monitor for suspicious file creation
• Review and restrict application sandbox permissions
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the vulnerability's impact. The vulnerability has a CVSS score of 5.1 and a severity of MEDIUM. Users of Samsung Email should verify their application version and update if necessary.

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.