CVE-2010-20122

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.

CVSS v4.0

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS

1.01% chance of exploitation in the next 30 days, 61th percentile

Published

2025-08-21

Updated

2026-05-15

Proof-of-concept exploits (2)

• https://www.exploit-db.com/exploits/12332
• https://www.exploit-db.com/exploits/16739

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/windows/ftp/xftp_client_pwd.rb

References

• CVE Record
• NVD entry

Related

• CVE-2010-20121
• CVE-2010-20123
• CVE-2010-20120
• CVE-2010-2015
• CVE-2010-20119
• CVE-2010-2016