CVE-2026-44403

Wing FTP Server before 8.1.3 contains an authenticated remote code execution vulnerability in the session serialization mechanism that allows authenticated administrators to inject arbitrary Lua code through the domain admin mydirectory field. Attackers can exploit unsafe serialization of session values into Lua source code without proper escaping of closing delimiters, causing the injected code to be executed when the poisoned session is loaded via loadfile().

Affected products

Wing Ftp Server

Wftpserver Wing Ftp Server

< 8.1.3

CVSS 4.0

8.6 HIGH

CVSS 3.1

7.2 HIGH

EPSS

2.6% (85th percentile)

Weakness

CWE-94

NVD status

Analyzed

Published

2026-05-12