Vulnerability Intelligence Report
Wing FTP Server < 8.1.3 Authenticated Remote Code Execution via Session Serialization
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().
No Active Exploit Signals
CVSS Base Score
7.2
HIGH
Exploitability:1.3
Impact Score:5.9
EPSS Probability:2.64%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-94 ↗Improper Control of Generation of Code ('Code Injection')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Wing FTP Server | Wing FTP Server | 8.1.2 (affected), 8.1.3 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
2.643%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VulnCheck · Bug Bounty Provider · USA |
| Reserved | 2026-05-05T21:38:43 |
| Published | 2026-05-12T20:43:41 |
| Patch Date | 2026-05-12 |
| Last Updated | 2026-07-14T20:01:15 |
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