What’s Vulnerable › Vulnerabilities

CVE-2025-34107: WinaXe 7.7 FTP Client Remote Buffer Overflow

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-15 · updated 2026-06-17
• Weakness: CWE-121

Description

A buffer overflow vulnerability exists in the WinaXe FTP Client version 7.7 within the FTP banner parsing functionality, WCMDPA10.dll. When the client connects to a remote FTP server and receives an overly long '220 Server Ready' response, the vulnerable component responsible for parsing the banner overflows a stack buffer, leading to arbitrary code execution under the context of the user.

Affected products

• LabF WinaXe FTP Client: 7.7

References

• http://hyp3rlinx.altervista.org/advisories/WINAXE-FTP-CLIENT-REMOTE-BUFFER-OVERFLOW.txt
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/winaxe_server_ready.rb
• https://www.exploit-db.com/exploits/40767
• https://www.vulncheck.com/advisories/wina-xe-ftp-client-remote-buffer-overflow

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