# CVE-2010-20122

## Summary

- **CVE ID:** CVE-2010-20122
- **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-121
- **Published:** Aug 21, 2025
- **Last Modified:** May 15, 2026

## Description

Xftp FTP Client version up to and including 3.0 (build 0238) contain a stack-based buffer overflow vulnerability triggered by a maliciously crafted PWD response from an FTP server. When the client connects to a server and receives an overly long directory string in response to the PWD command, the client fails to properly validate the length of the input before copying it into a fixed-size buffer. This results in memory corruption and allows remote attackers to execute arbitrary code on the client system.

## Affected Products

- NetSarang Computer, Inc. — Xftp FTP Client (*)
- NetSarang Computer, Inc. — Xftp FTP Client (0)

## References

- [CNA](https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/xftp_client_pwd.rb)
- [CNA](https://www.exploit-db.com/exploits/12332)
- [CNA](https://www.exploit-db.com/exploits/16739)
- [CNA](https://web.archive.org/web/20090312072219/http://www.netsarang.com/download/down_xft3.html)
- [CNA](https://www.vulncheck.com/advisories/xftp-ftp-client-pwd-response-buffer-overflow)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 54.70%
- **EPSS Percentile:** 98.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._