---
id: CVE-2026-21120
title: >-
  Use after free in WSM service prior to SMR Oct-2026 Release 1 allows local
  attackers to potentially execute arbitrary code with system privilege.
summary: >-
  Use after free in WSM service prior to SMR Oct-2026 Release 1 allows local
  attackers to potentially execute arbitrary code with system privilege.
severity: high
cwe:
  - CWE-416
published: '2026-10-12'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T20:13:37.910'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-21120'
references:
  - url: 'https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=10'
    label: mobile.security@samsung.com
tags:
  - nvd
  - cve.org
epss: 0.00121
epssPercentile: 0.0192
ingestedAt: '2026-10-12T14:50:34.085Z'
vendor: Samsung Mobile
product: Samsung Mobile Devices
affected:
  - devices (all versions)
cvss: 8.9
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-12T00:00:00+00:00'
cvssSource: cna
---

## Overview

Use after free in WSM service prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code with system privilege.

## Remediation

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