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CVE-2026-21135 Samsung Mobile CVE debrief

CVE-2026-21135 is a medium-severity vulnerability in Samsung Internet prior to version 30.0.5.6, allowing local attackers to access sensitive information due to improper access control. This vulnerability affects Samsung Internet installations, and defenders should assess exposure and prioritize verification and upgrades. The CVE record confirms the vulnerability exists in Samsung Internet prior to version 30.0.5.6, but provides limited information about the vulnerability. Defenders should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance.

Vendor
Samsung Mobile
Product
Samsung Internet
CVSS
MEDIUM 5.9
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 managing and securing Samsung Internet installations should assess exposure and prioritize verification and upgrades.

Why it matters

CVE-2026-21135 is a medium-severity vulnerability in Samsung Internet that allows local attackers to access sensitive information. Defenders should prioritize verifying and upgrading Samsung Internet to version 30.0.5.6 or later, and assess exposure in their environment.

  • Local attackers may access sensitive information
  • Verification of Samsung Internet version is necessary
  • Upgrades to version 30.0.5.6 or later are required

Technical summary

The vulnerability exists in Samsung Internet prior to version 30.0.5.6 and allows local attackers to access sensitive information due to improper access control. This vulnerability affects Samsung Internet installations, and defenders should assess exposure and prioritize verification and upgrades. The CVE record and source item provide limited information about the vulnerability, but confirm that it exists in Samsung Internet prior to version 30.0.5.6. Defenders should review compensating controls for exposed systems while remediation is scheduled and verified.

Defensive priority

Defenders should prioritize verifying and upgrading Samsung Internet to version 30.0.5.6 or later, and assess exposure in their environment.

Recommended defensive actions

  • Verify and upgrade Samsung Internet to version 30.0.5.6 or later
  • Assess exposure in your environment
  • Monitor for potential local attacks

Evidence notes

The CVE record and source item provide limited information about the vulnerability, but confirm that it exists in Samsung Internet prior to version 30.0.5.6.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21135 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21135

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

  • CVE-2026-21135 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21135

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

Supplemental references

  • CVE-2026-21135

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21135.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.