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CVE-2026-21122 Samsung Mobile CVE debrief

CVE-2026-21122 is an out-of-bounds write vulnerability in libsamsungtts.so affecting Samsung Mobile Devices prior to SMR Oct-2026 Release 1. Local attackers can exploit this to execute arbitrary code. The vulnerability has a high severity score and requires immediate attention from defenders responsible for local attack surface management, patching, and vulnerability management. The CVE record was published on 2026-10-12T04:57:38.206Z and has not been modified since then. Official CVE Program record and NVD vulnerability detail page confirm the out-of-bounds write vulnerability in libsamsungtts.so.

Vendor
Samsung Mobile
Product
Samsung Mobile Devices
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-12
Original CVE updated
2026-10-12
Advisory published
2026-10-12
Advisory updated
2026-10-12

Who should care

Defenders responsible for local attack surface management, patching, and vulnerability management for Samsung Mobile Devices should assess exposure and prioritize patching.

Why it matters

CVE-2026-21122 is a high-severity vulnerability in libsamsungtts.so affecting Samsung Mobile Devices. Local attackers can exploit it to execute arbitrary code. Defenders should assess local attack surface, prioritize patching, and verify device configurations and inventory.

  • Local attackers can execute arbitrary code on vulnerable devices
  • Patching is required to prevent exploitation
  • Device configurations and inventory need verification

Technical summary

The vulnerability is an out-of-bounds write in libsamsungtts.so, which can be exploited by local attackers to execute arbitrary code on affected Samsung Mobile Devices prior to SMR Oct-2026 Release 1. The vulnerability has a CVSS score of 7 and a severity of HIGH. Official CVE Program record and NVD vulnerability detail page confirm the vulnerability details. Defenders should assess local attack surface, prioritize patching, and verify device configurations and inventory for affected versions.

Defensive priority

High priority for local attack surface assessment and patching

Recommended defensive actions

  • Assess local attack surface for vulnerable Samsung Mobile Devices
  • Prioritize patching for devices with exposed libsamsungtts.so
  • Verify device configurations and inventory for affected versions

Evidence notes

Official CVE Program record and NVD vulnerability detail page confirm the out-of-bounds write vulnerability in libsamsungtts.so. Samsung Mobile Devices are affected prior to SMR Oct-2026 Release 1.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21122 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21122

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-21122 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21122

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

Supplemental references

  • CVE-2026-21122

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21122.json

    cve_program_cvelist_v5

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.