All vulnerabilities
CVE-2026-105420

Path Traversal in Wing WFTP Server leading to Remote Code Execution

Wing Soft Technology Wing FTP ServerNetwork & edge
Open in ThreatlineRecord JSON
CVSS
9.4Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in8.2.6Fixed versionCVE List
Published28 Oct 2026Updated 28 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 1

  • Wing FTP Serveraffected: all versions before 8.2.6CVE List

References 2