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CVE-2026-21117 Samsung Mobile CVE debrief

CVE-2026-21117 is a medium-severity vulnerability in CocktailBarService on Samsung Mobile Devices prior to SMR Oct-2026 Release 1. The vulnerability allows local attackers to access sensitive information. Defenders responsible for Samsung Mobile Devices should assess exposure and prioritize applying the October 2026 security update to prevent potential local information disclosure. This vulnerability has been identified in the CVE Program record and the NIST NVD detail page, providing source-specific vulnerability assessments. The October 2026 security update should be verified and applied to prevent exploitation. Inventory and monitoring may be necessary to detect potential and

Vendor
Samsung Mobile
Product
Samsung Mobile Devices
CVSS
MEDIUM 5.1
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 Samsung Mobile Devices should assess exposure and prioritize applying the October 2026 security update to prevent potential local information disclosure.

Why it matters

CVE-2026-21117 is a medium-severity vulnerability in CocktailBarService on Samsung Mobile Devices. Defenders should prioritize verifying and applying the October 2026 security update to prevent potential local information disclosure. The vulnerability allows local attackers to access sensitive information prior to SMR Oct-2026 Release 1.

  • Local attackers may access sensitive information on affected Samsung Mobile Devices
  • Defenders must verify and apply the October 2026 security update to prevent exploitation
  • Inventory and monitoring may be necessary to detect potential exposure

Technical summary

CVE-2026-21117 is an improper access control vulnerability in CocktailBarService on Samsung Mobile Devices prior to SMR Oct-2026 Release 1. Local attackers can exploit this vulnerability to access sensitive information. The vulnerability has been confirmed by the CVE Program and NIST NVD, providing official guidance on affected scope, severity, and vendor guidance. Defenders should prioritize verifying and applying the October 2026 security update for Samsung Mobile Devices to prevent potential local information disclosure. This involves reviewing compensating

Defensive priority

Defenders should prioritize verifying and applying the October 2026 security update for Samsung Mobile Devices to prevent potential local information disclosure.

Recommended defensive actions

  • Verify and apply the October 2026 security update for Samsung Mobile Devices
  • Inventory Samsung Mobile Devices for potential exposure
  • Monitor for local attackers attempting to access sensitive information

Evidence notes

The CVE Program and NVD records indicate improper access control in CocktailBarService, allowing local attackers to access sensitive information prior to SMR Oct-2026 Release 1.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21117 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21117

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

  • CVE-2026-21117 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21117

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

Supplemental references

  • CVE-2026-21117

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/21xxx/CVE-2026-21117.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.