CVE-2012-10055

ComSndFTP FTP Server version 1.3.7 Beta contains a format string vulnerability in its handling of the USER command. By sending a specially crafted username containing format specifiers, a remote attacker can overwrite a hardcoded function pointer in memory (specifically WSACleanup from Ws2_32.dll). This allows the attacker to redirect execution flow and bypass DEP protections using a ROP chain, ultimately leading to arbitrary code execution. The vulnerability is exploitable without authentication and affects default configurations.

• CWE-134

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/comsnd_ftpd_fmtstr.rb
• https://web.archive.org/web/20120317214524/http://ftp.comsnd.com/
• https://www.exploit-db.com/exploits/19024
• https://www.exploit-db.com/exploits/19177
• https://www.vulncheck.com/advisories/comsndftp-user-format-string-rce
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/comsnd_ftpd_fmtstr.rb
• https://www.exploit-db.com/exploits/19024
• https://www.exploit-db.com/exploits/19177

Published

Aug 13, 2025

Last Modified

Jun 16, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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