CVE-2012-10021

CRITICAL

D-Link DIR-605L Wireless N300 Cloud Router <1.13 - Buffer Overflow

Title source: llm

Exploitation Summary

EIP tracks 2 public exploits for CVE-2012-10021. PoCs published by Metasploit, Craig Heffner, juan vazquez, including Metasploit module exploits/linux/http/dlink_dir605l_captcha_bof.

AI-analyzed exploit summary This Metasploit module exploits a buffer overflow in D-Link DIR-605L routers via insecure handling of captcha data, achieving remote code execution through a ROP chain. It targets MIPS-based firmware and has been tested in a QEMU environment.

Description

A stack-based buffer overflow vulnerability exists in D-Link DIR-605L Wireless N300 Cloud Router firmware versions 1.12 and 1.13 via the getAuthCode() function. The flaw arises from unsafe usage of sprintf() when processing user-supplied CAPTCHA data via the FILECODE parameter in /goform/formLogin. A remote unauthenticated attacker can exploit this to execute arbitrary code with root privileges on the device.

Exploits (2)

exploitdb WORKING POC

by Metasploit · rubyremotehardware

https://www.exploit-db.com/exploits/29127

View Code ZIP pw:eip

This Metasploit module exploits a buffer overflow in D-Link DIR-605L routers via insecure handling of captcha data, achieving remote code execution through a ROP chain. It targets MIPS-based firmware and has been tested in a QEMU environment.

Classification

Working Poc 95%

Attack Type

Rce

Complexity

Complex

Reliability

Reliable

Target: D-Link DIR-605L Firmware 1.13

No auth needed

Prerequisites: Network access to the vulnerable router · Boa/0.94.14rc21 web server running on the target

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1203 - Exploitation for Client Execution

devstral-2 · analyzed Feb 16, 2026 Full analysis →

metasploit WORKING POC MANUAL

by Craig Heffner, juan vazquez · rubypoc

https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/dlink_dir605l_captcha_bof.rb

View Code ZIP pw:eip

This Metasploit module exploits a buffer overflow vulnerability in D-Link DIR-605L routers via insecure handling of captcha information, leading to remote code execution. It uses ROP techniques to bypass DEP and execute shellcode on MIPS-based systems.

Classification

Working Poc 95%

Attack Type

Rce

Complexity

Moderate

Reliability

Reliable

Target: D-Link DIR-605L firmware 1.12 and 1.13

No auth needed

Prerequisites: Network access to the vulnerable router · Boa web server running on the target

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1203 - Exploitation for Client Execution

devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5

Core References

Exploit exploit

https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/dlink_dir605l_captcha_bof.rb

Exploit, Third Party Advisory technical-description exploit

https://web.archive.org/web/20121012062554/http://www.devttys0.com/2012/10/exploiting-a-mips-stack-overflow/

Exploit exploit

https://www.exploit-db.com/exploits/29127

Issue Tracking

https://forums.dlink.com/index.php?topic=51923.0

Third Party Advisory third-party-advisory

https://www.vulncheck.com/advisories/dlink-dir605l-captcha-handling-stack-based-buffer-overflow

Scores

CVSS v3 9.8

EPSS 0.7125

EPSS Percentile 98.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-121

Status published

Products (2)

D-Link/DIR-605L 1.12 - 1.13

dlink/dir-605l_firmware 1.12 - 1.13

Published Jul 31, 2025

Tracked Since Feb 18, 2026