---
id: CVE-2026-21100
title: >-
  Improper access control in SystemUI prior to SMR Sep-2026 Release 1 allows
  local attackers to launch arbitrary activity.
summary: >-
  Improper access control in SystemUI prior to SMR Sep-2026 Release 1 allows
  local attackers to launch arbitrary activity.
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-284
vendor: Samsung Mobile
product: Samsung Mobile Devices
affected:
  - devices (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T17:45:32.648202Z'
published: '2026-09-09'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T17:45:52.499Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-21100'
references:
  - url: 'https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=09'
tags:
  - cve.org
epss: 0.00093
epssPercentile: 0.00524
ingestedAt: '2026-09-11T11:32:42.884Z'
---

## Overview

Improper access control in SystemUI prior to SMR Sep-2026 Release 1 allows local attackers to launch arbitrary activity.

## Affected

- `devices (all versions)`

## Remediation

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