# CVE-2012-10055

## Summary

- **CVE ID:** CVE-2012-10055
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (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)
- **CWE:** CWE-134
- **Published:** Aug 13, 2025
- **Last Modified:** Jul 15, 2026

## Description

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.

## Affected Products

- ComSndFTP — FTP Server (1.3.7 Beta)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 58.95%
- **EPSS Percentile:** 98.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._