---
id: "CVE-2026-111853"
kind: "vulnerability"
aliases: ["CVE-2026-111853"]
title: "Tektronix MDO oscilloscopes: SCPI mount command lets remote attackers run OS commands"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "lab-equipment", "oscilloscope", "tektronix", "test-and-measurement"]
not_affected_if: ["firmware-1.21.1-or-later", "no-network-exposure"]
published_at: "2026-10-17T02:17:18+00:00"
first_seen_at: "2026-10-23T21:57:14+00:00"
updated_at: "2026-10-23T22:33:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111853", "first_seen_at": "2026-10-23T21:57:14+00:00"}]
---

# Tektronix MDO oscilloscopes: SCPI mount command lets remote attackers run OS commands

Tektronix 3 Series MDO oscilloscopes before firmware 1.21.1 have an OS command injection flaw in the FILESystem:MOUNT:DRIve SCPI command. A remote attacker can run arbitrary operating system commands on the device with elevated privileges.

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

## How to check

Check the firmware version on the scope (unknown for the exact menu path in the sources); any unit reporting a version below 1.21.1 is exposed.

## Fix

Update the firmware to 1.21.1 or later.
Restrict network access to the scope's SCPI port until patched.

## Timeline

- 2026-10-23T21:57:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111853

## From the sources

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.

---

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