---
id: CVE-2026-21121
title: >-
  Improper handling of insufficient permission in CmcCore prior to SMR Oct-2026
  Release 1 allows local attackers to use the privileged APIs.
summary: >-
  Improper handling of insufficient permission in CmcCore prior to SMR Oct-2026
  Release 1 allows local attackers to use the privileged APIs.
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-280
vendor: Samsung Mobile
product: Samsung Mobile Devices
affected:
  - devices (all versions)
published: '2026-10-12'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T17:17:33.523'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-21121'
references:
  - url: 'https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=10'
    label: mobile.security@samsung.com
tags:
  - nvd
  - cve.org
epss: 0.00113
epssPercentile: 0.01397
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T16:08:12.191301Z'
cvssSource: cna
ingestedAt: '2026-10-12T14:50:34.085Z'
---

## Overview

Improper handling of insufficient permission in CmcCore prior to SMR Oct-2026 Release 1 allows local attackers to use the privileged APIs.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.