What’s Vulnerable › Vulnerabilities

CVE-2010-20122: Xftp FTP Client <= 3.0 PWD Response Buffer Overflow

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-21 · updated 2026-06-16
• Weakness: CWE-121

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: through 3.0 (build 0238)

References

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

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