CVE-2009-20009

CRITICAL

Belkin Bulldog Plus 4.0.2 build 1219 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2009-20009. PoCs published by Elazar, MC, including Metasploit module exploits/windows/http/belkin_bulldog.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in the Belkin BullDog Plus UPS-Service. It uses a JMP ESP address from user32.dll and a Metasploit bind shellcode to achieve remote code execution on Windows XP SP3.

Description

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.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Elazar · textremotewindows
https://www.exploit-db.com/exploits/8173

This exploit targets a buffer overflow vulnerability in the Belkin BullDog Plus UPS-Service. It uses a JMP ESP address from user32.dll and a Metasploit bind shellcode to achieve remote code execution on Windows XP SP3.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Belkin BullDog Plus UPS-Service
No auth needed
Prerequisites: Network access to the target service · Windows XP SP3 environment
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC NORMAL
by MC · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/belkin_bulldog.rb

This Metasploit module exploits a stack buffer overflow in Belkin Bulldog Plus 4.0.2 build 1219 via a crafted HTTP request with an oversized Authorization header. It leverages a known return address (0x7e4456f7) for Windows XP SP3 to achieve remote code execution.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Belkin Bulldog Plus 4.0.2 build 1219
No auth needed
Prerequisites: Network access to the target device · Target running vulnerable Belkin Bulldog Plus firmware
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v4 9.3
EPSS 0.0153
EPSS Percentile 71.5%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-121
Status published
Products (1)
Belkin International, Inc./Bulldog Plus UPS Monitoring Software < 4.0.2 build 1219
Published Aug 30, 2025
Tracked Since Feb 18, 2026