CVE-2026-105420 Path Traversal in Wing WFTP Server leading to Remote Code Execution
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-105420?
CVE-2026-105420 is a critical vulnerability in Wing FTP Server, published on 28 Oct 2026.
Official description
Wing FTP Server does not verify user's base folder. An attacker with admin privileges can add user directories via scripts, allowing the added directories to escape the base folder. This allows the attacker to write files on the system and can lead to remote code execution with process owner privileges.Critically, since the installation guide mentions running the command with `sudo`, the files are created as “root.”
This issue was fixed in version 8.2.6.
Weakness: CWE-22
Which versions are affected by CVE-2026-105420?
How do I fix CVE-2026-105420?
No fix has been published for CVE-2026-105420 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-105420 being exploited?
There is no known exploitation of CVE-2026-105420 in the wild and no public exploit code.
Sources
Also known as GHSA-fj2q-v6ch-v3mg.