CVE-2012-10055
ComSndFTP v1.3.7 Beta USER Format String RCE
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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 | CWE-134 |
| Vendor | comsndftp |
| Product | ftp server |
| Published | Aug 13, 2025 |
| Last Updated | Apr 7, 2026 |
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Affected Versions
ComSndFTP / FTP Server
1.3.7 Beta
References
raw.githubusercontent.com: https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/comsnd_ftpd_fmtstr.rb exploit-db.com: https://www.exploit-db.com/exploits/19024 exploit-db.com: https://www.exploit-db.com/exploits/19177 web.archive.org: https://web.archive.org/web/20120317214524/http://ftp.comsnd.com/ vulncheck.com: https://www.vulncheck.com/advisories/comsndftp-user-format-string-rce
Credits
ChaoYi Huang