by Kastro
Paper/Archive/CVE-2026-105420

CVE-2026-105420

Wing Soft Technology Wing FTP Server — Path Traversal in Wing WFTP Server leading to Remote Code Execution

EPSS 0.5%CVSS 9.4
critical.is priorityof 100
37
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 44.0.440 × 208.8No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Wing FTP Server< 8.2.68.2.6CNA

Scores by source

CERT-PL (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References

writeupcert.pl/en/posts/2026/10/CVE-2026-105420refwftpserver.com