---
id: CVE-2026-105043
title: >-
  MathWorks Simulink before R2026b, when showing a crafted .slx file, can have
  blocks that are never visible in the Simulink Editor but will cause code
  execution.
summary: >-
  MathWorks Simulink before R2026b, when showing a crafted .slx file, can have
  blocks that are never visible in the Simulink Editor but will cause code
  execution.
severity: low
cvss: 3.6
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-451
vendor: MathWorks
product: Simulink
affected:
  - Simulink < R2026b
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T22:16:54.227'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105043'
references:
  - url: >-
      https://alexanderboll.dev/disclosures/simulink-vulnerability-concealed-blocks/
    label: cve@mitre.org
  - url: >-
      https://www.mathworks.com/help/simulink/release-notes.html#mw_81eb54b6-4dfa-42c1-8c3c-e998eff5a8cd
    label: cve@mitre.org
  - url: 'https://www.mathworks.com/products/simulink.html'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T22:33:09.850Z'
---

## Overview

MathWorks Simulink before R2026b, when showing a crafted .slx file, can have blocks that are never visible in the Simulink Editor but will cause code execution.

## Remediation

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