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.
Does this matter?
A public exploit is published in Exploit-DB and the impact is high, while EPSS rates exploitation at 2.6%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
Description
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().
- CVSS 4.0
- 8.6 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 2.64% probability · 85th percentile
- Public exploits
- 1 in Exploit-DB · first 29 May 2026
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Affected
- wftpserver/wing ftp server
- Source
- disclosure@vulncheck.com
EPSS 2.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://www.vulncheck.com/advisories/wing-ftp-server-authenticated-remote-code-execution-via-session-serializationThird Party Advisory
- https://www.wftpserver.com/serverhistory.htmProduct, Release Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.