---
id: CVE-2026-21157
title: >-
  Improper input validation in Bixby prior to version 4.0.85.6 allows privileged
  local attackers to launch arbitrary activity.
summary: >-
  Improper input validation in Bixby prior to version 4.0.85.6 allows privileged
  local attackers to launch arbitrary activity.
severity: high
cvss: 8.3
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-20
vendor: Samsung Mobile
product: Bixby
affected:
  - Bixby (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-29T00:00:00+00:00'
published: '2026-10-29'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T03:55:58.739Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-21157'
references:
  - url: 'https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=07'
tags:
  - cve.org
epss: 0.00106
epssPercentile: 0.01104
ingestedAt: '2026-11-03T10:42:03.623Z'
---

## Overview

Improper input validation in Bixby prior to version 4.0.85.6 allows privileged local attackers to launch arbitrary activity.

## Affected

- `Bixby (all versions)`

## Remediation

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