---
id: "CVE-2026-21157"
kind: "vulnerability"
aliases: ["CVE-2026-21157"]
title: "Samsung Bixby: input validation flaw lets local attackers launch arbitrary activities"
severity: "high"
cvss: 8.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["android", "mobile", "other", "samsung"]
not_affected_if: ["bixby-updated"]
published_at: "2026-10-29T01:17:23+00:00"
first_seen_at: "2026-10-29T01:36:30+00:00"
updated_at: "2026-10-29T01:37:39+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21157", "first_seen_at": "2026-10-29T01:36:30+00:00"}]
---

# Samsung Bixby: input validation flaw lets local attackers launch arbitrary activities

Bixby, Samsung's voice assistant, before version 4.0.85.6 does not properly validate input. A privileged local attacker can use this to launch arbitrary activities on the device.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Bixby version in Settings > Apps > Bixby, or the unknown package version on a managed device.
- unknown for any other check, the sources do not say.

## Fix

- Update Bixby to `4.0.85.6` or later through the Galaxy Store or system update.

## Timeline

- 2026-10-29T01:36:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-21157

## From the sources

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

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_