CVE-2010-20122

CRITICAL

Xftp FTP Client <3.0 (build 0238) - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 3 public exploits for CVE-2010-20122. PoCs published by Metasploit, zombiefx, zombiefx, dookie, including Metasploit module exploits/windows/ftp/xftp_client_pwd.

AI-analyzed exploit summary This Metasploit module exploits a buffer overflow in Xftp 3.0 FTP client via an excessively long PWD response, leading to remote code execution. The exploit uses a SEH-based technique with a JMP ECX instruction in nslicense.dll to achieve control flow redirection.

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.

Exploits (3)

exploitdb WORKING POC VERIFIED
by Metasploit · rubyremotewindows
https://www.exploit-db.com/exploits/16739

This Metasploit module exploits a buffer overflow in Xftp 3.0 FTP client via an excessively long PWD response, leading to remote code execution. The exploit uses a SEH-based technique with a JMP ECX instruction in nslicense.dll to achieve control flow redirection.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Xftp FTP Client 3.0
No auth needed
Prerequisites: Network access to the target FTP client · Target must initiate an FTP connection to the attacker's server
devstral-2 · analyzed Feb 18, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by zombiefx · perlremotewindows
https://www.exploit-db.com/exploits/12332

This exploit targets a buffer overflow vulnerability in Xftp client 3.0 by sending an overly long PWD response. It includes a reverse shell payload and is designed to achieve remote code execution on the target system.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Xftp client 3.0 build 0238
No auth needed
Prerequisites: Network access to the target system · Xftp client 3.0 build 0238 installed on the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC NORMAL
by zombiefx, dookie · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/ftp/xftp_client_pwd.rb

This Metasploit module exploits a buffer overflow in Xftp 3.0 FTP client via an excessively long PWD response, leading to remote code execution. It uses a SEH-based exploit with a JMP ECX instruction in nslicense.dll.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Xftp FTP Client 3.0
No auth needed
Prerequisites: Network access to the target · Target must connect to a malicious FTP server
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v4 9.3
EPSS 0.0095
EPSS Percentile 56.3%
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

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-121
Status published
Products (1)
NetSarang Computer, Inc./Xftp FTP Client < 3.0 (build 0238)
Published Aug 21, 2025
Tracked Since Feb 18, 2026