---
id: CVE-2026-111853
title: An issue was discovered on Tektronix 3 Series MDO devices before 1.21.1
summary: >-
  An issue was discovered on Tektronix 3 Series MDO devices before 1.21.1. An OS
  command injection vulnerability exists in the FILESystem:MOUNT:DRIve SCPI
  command handler. Insufficient neutralization of user-supplied input allows
  remote at…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-78
vendor: Tektronix
product: 3 Series MDO
affected:
  - 3_series_mdo < 1.21.1
published: '2026-10-17'
updated: '2026-10-17'
sourceUpdated: '2026-10-17T02:08:13.787Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111853'
references:
  - url: 'https://www.tek.com/en/products/oscilloscopes/3-series-mdo'
  - url: 'https://download.tek.com/document/TEK-PSA-002-092026.pdf'
tags:
  - cve.org
ingestedAt: '2026-10-17T02:57:58.445Z'
epss: 0.00857
epssPercentile: 0.57672
---

## Overview

An issue was discovered on Tektronix 3 Series MDO devices before 1.21.1. An OS command injection vulnerability exists in the FILESystem:MOUNT:DRIve SCPI command handler. Insufficient neutralization of user-supplied input allows remote attackers to execute arbitrary operating system commands with elevated privileges.

## Affected

- `3_series_mdo < 1.21.1`

## Remediation

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