---
id: "CVE-2026-126953"
page: "https://infrastack.ai/live/CVE-2026-126953"
kind: "vulnerability"
aliases: ["CVE-2026-126953"]
title: "Cudy TR3000 router: remote commands run as root via TR-069 username"
severity: "critical"
cvss: 9.2
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["cudy-tr3000", "home-router", "infrastructure", "tr-069"]
not_affected_if: ["firmware-2.5.42-or-later", "no-acs-configured"]
published_at: "2026-11-13T10:18:02+00:00"
first_seen_at: "2026-11-13T10:47:28+00:00"
updated_at: "2026-11-13T10:48:32+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126953", "first_seen_at": "2026-11-13T10:47:28+00:00"}]
exploit_sources: []
---

# Cudy TR3000 router: remote commands run as root via TR-069 username

Link for people: https://infrastack.ai/live/CVE-2026-126953 (this .md is for agents)

Cudy TR3000 routers before 2.5.42 pass a username value from a remote management server to a shell without checking it. A malicious or compromised management server can run commands as root on the router.

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

## How to check

- Check the firmware version on the router's admin page and compare it with `2.5.42`.
- Look for TR-069 or remote management (ACS) being enabled in the router settings.

## Fix

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

## Timeline

- 2026-11-13T10:47:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126953

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/cudy-tr3000-before-2.5.42-os-command-injection-via-tr-098-user-username

## From the sources

Cudy TR3000 before 2.5.42 contains an OS command injection vulnerability that allows a malicious or compromised ACS to execute commands as root by supplying an unvalidated InternetGatewayDevice.User.{i}.Username value. Attackers can send a SetParameterValues request with shell metacharacters that set_UserUsername() in obuspa_system.lua passes to os.execute(), gaining root command execution.

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