---
id: "CVE-2026-75488"
page: "https://infrastack.ai/live/CVE-2026-75488"
kind: "vulnerability"
aliases: ["CVE-2026-75488"]
title: "Cudy TR3000 router: CWMP client stack overflow lets a malicious ACS crash the process"
severity: "high"
cvss: 8.2
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["cudy", "cwmp", "home-router", "infrastructure", "router", "tr-069", "tr3000"]
not_affected_if: ["cwmp-disabled", "firmware-2.5.42-or-later", "managed-hosting"]
published_at: "2026-11-13T10:18:16+00:00"
first_seen_at: "2026-11-13T10:47:35+00:00"
updated_at: "2026-11-13T10:51:21+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75488", "first_seen_at": "2026-11-13T10:47:35+00:00"}]
exploit_sources: []
---

# Cudy TR3000 router: CWMP client stack overflow lets a malicious ACS crash the process

Link for people: https://infrastack.ai/live/CVE-2026-75488 (this .md is for agents)

The Cudy TR3000 router's CWMP (TR-069) client copies oversized Username and Password values into a 128-byte stack buffer without bounds checking. A malicious or compromised ACS (auto-configuration server) can send 256-byte credentials in Download or Upload requests, corrupting stack memory and crashing the CWMP process.

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

## How to check

- Check the router's firmware version in the Cudy web admin (System or Status page) and compare it with `2.5.42`.
- Check whether TR-069 / CWMP remote management is enabled on the device.

## Fix

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

## Timeline

- 2026-11-13T10:47:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-75488

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/cudy-tr3000-before-2.5.42-stack-buffer-overflow-via-cwmp-basic-authorization-builder

## From the sources

Cudy TR3000 before 2.5.42 contains a stack buffer overflow vulnerability in the CWMP client that allows a malicious ACS to corrupt stack memory via oversized credentials. Attackers controlling the ACS can send Username and Password values up to 256 bytes in TR-069 Download or Upload requests, overflowing 128-byte stack buffers and crashing the CWMP process.

---

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