CVE-2026-44403 json
Wing FTP Server < 8.1.3 Authenticated Remote Code Execution via Session Serialization
published 2026-05-12 5 mo ago modified 2026-07-14 3 mo ago also EUVD-2026-29848
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.6%
- EPSS 2.6% chance of exploitation in 30 days, percentile 85%
- public exploits
- 1
- Exploit-DB
Summary
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().
Patch / fix
- Wing FTP Server Wing FTP Server 8.1.3
Timeline
- Published
- First public exploit (EDB-52589)
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
2.64% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-52589 Wing FTP Server 8.1.3 - Authenticated Remote Code Execution remote, 2026-05-29
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.6 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.6 | CVSS: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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Wing FTP Server Wing FTP Server
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
vulncheck.com
/advisories/wing-ftp-server-authenticated-remote-code-execution-via-session-serialization
vendor-advisory, third-party-advisory
-
wftpserver.com
/serverhistory.htm
release-notes, product
Sources
- CVE List CVE-2026-44403
- NVD CVE-2026-44403
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