CVE-2026-21049 Samsung Mobile CVE debrief

Who should care

This vulnerability affects users of Samsung devices with libpadm.so library prior to SMR Jul-2026 Release 1. Local attackers can exploit this vulnerability to execute arbitrary code. Operators, security teams, and administrators of affected systems should prioritize patching.

Technical summary

The vulnerability is an out-of-bounds write in the libpadm.so library, which can be exploited by local attackers to execute arbitrary code. The vulnerability has a CVSS score of 8.4 and a severity of HIGH. Affected products include Samsung devices with libpadm.so library prior to SMR Jul-2026 Release 1.

Defensive priority

High priority should be given to patching this vulnerability as it allows local attackers to execute arbitrary code.

Recommended defensive actions

• Apply the security update released by Samsung to patch the libpadm.so library.
• Ensure that devices are updated to SMR Jul-2026 Release 1 or later.
• Monitor devices for suspicious activity.
• 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 was published on 2026-07-10T05:16:35.533Z and has not been modified since then. The vulnerability has a CVSS score of 8.4 and a severity of HIGH. Samsung has released a security update to address this issue. However, the exact scope of affected products and potential impact on various systems remains limited based on available information.

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.