---
id: CVE-2009-20009
title: >-
  Belkin Bulldog Plus version 4.0.2 build 1219 contains a stack-based buffer
  overflow vulnerability in its web service authentication handler
summary: >-
  Belkin Bulldog Plus version 4.0.2 build 1219 contains a stack-based buffer
  overflow vulnerability in its web service authentication handler. When a
  specially crafted HTTP request is sent with an oversized Authorization header,
  the applic…
severity: none
cwe:
  - CWE-121
published: '2025-08-30'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T23:10:00.233'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2009-20009'
references:
  - url: >-
      https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/belkin_bulldog.rb
    label: disclosure@vulncheck.com
  - url: 'https://s3.belkin.com/support/dl/bulldogwindows.pdf'
    label: disclosure@vulncheck.com
  - url: 'https://www.exploit-db.com/exploits/8173'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.fortiguard.com/encyclopedia/ips/17325/belkin-bulldog-plus-web-services-buffer-overflow
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/belkin-bulldog-plus-web-service-buffer-overflow
    label: disclosure@vulncheck.com
tags:
  - nvd
  - exploit-available
epss: 0.01262
epssPercentile: 0.68584
exploits:
  metasploit:
    - exploit/windows/http/belkin_bulldog
  checkedAt: '2026-10-02T00:05:28.621Z'
exploitAvailable: true
ingestedAt: '2026-10-02T00:04:54.710Z'
---

## Overview

Belkin Bulldog Plus version 4.0.2 build 1219 contains a stack-based buffer overflow vulnerability in its web service authentication handler. When a specially crafted HTTP request is sent with an oversized Authorization header, the application fails to properly validate the input length before copying it into a fixed-size buffer, resulting in memory corruption and potential remote code execution. Exploitation requires network access and does not require prior authentication.

## Remediation

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