---
id: "CVE-2026-75490"
page: "https://infrastack.ai/live/CVE-2026-75490"
kind: "vulnerability"
aliases: ["CVE-2026-75490"]
title: "Cudy TR3000 router: rogue mDNS controller lets adjacent attackers run root commands"
severity: "high"
cvss: 7.7
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Cudy TR3000", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["automesh", "cudy-tr3000", "home-router", "infrastructure", "mdns"]
not_affected_if: ["firmware-2.5.42-or-later", "no-untrusted-ethernet-segment"]
published_at: "2026-11-13T10:18:16+00:00"
first_seen_at: "2026-11-13T10:47:35+00:00"
updated_at: "2026-11-13T10:52:28+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75490", "first_seen_at": "2026-11-13T10:47:35+00:00"}]
exploit_sources: []
---

# Cudy TR3000 router: rogue mDNS controller lets adjacent attackers run root commands

Link for people: https://infrastack.ai/live/CVE-2026-75490 (this .md is for agents)

Cudy TR3000 routers before 2.5.42 accept commands from a rogue automesh controller that an attacker advertises over mDNS on the local Ethernet segment. The attacker gets remote code execution as root on the router without logging in.

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

## Affected

- vendor:Cudy TR3000 affected range not listed fixed no fixed version listed

## How to check

- Check the firmware version on the router's admin page and compare it with `2.5.42`.

## Fix

- Cudy TR3000: move to `2.5.42` or later.

## Timeline

- 2026-11-13T10:47:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-75490

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/cudy-tr3000-before-2.5.42-unauthenticated-rce-via-mdns-automesh-broker-adoption

## From the sources

Cudy TR3000 before 2.5.42 contains a remote code execution vulnerability that allows unauthenticated adjacent attackers to run root commands by advertising a rogue automesh controller over mDNS. Attackers on the upstream Ethernet segment can advertise _cudycmagent._tcp records pointing to a malicious MQTT broker, then send commands encrypted with a fixed AES key that router/batchcmd.lua executes as root.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_