CVE-2012-10021

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.

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - disclosure@vulncheck.com

Published

2025-07-31

Last modified

2026-05-14

Weaknesses

CWE-121

Affected products

• Dir-605l Firmware (Dlink)

References

• https://forums.dlink.com/index.php?topic=51923.0
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/dlink_dir605l_captcha_…
• https://web.archive.org/web/20121012062554/http://www.devttys0.com/2012/10/exploiting-a-mips-stack-overflow/
• https://www.exploit-db.com/exploits/29127
• https://www.vulncheck.com/advisories/dlink-dir605l-captcha-handling-stack-based-buffer-overflow