CVE-2025-34107 WinaXe 7.7 FTP Client Remote Buffer Overflow
A remote attacker can execute arbitrary code by sending a maliciously crafted FTP banner to the WinaXe FTP client.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-34107?
CVE-2025-34107 is a high-severity memory corruption vulnerability in LabF WinaXe FTP Client, published on 15 Jul 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-121
Which versions are affected by CVE-2025-34107?
How do I fix CVE-2025-34107?
No fix has been published for CVE-2025-34107 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-34107 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34107 exists.
Public exploit code: 1 Metasploit module.
Sources
Also known as GHSA-78rx-wv2g-87wh.