Wing FTP Server up to 8.1.2 loadfile code injection

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Wing FTP Server up to 8.1.2. The impacted element is the function loadfile. Performing a manipulation results in code injection. This vulnerability is identified as CVE-2026-44403. The attack can be initiated remotely. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Wing FTP Server up to 8.1.2. It has been classified as critical. This affects the function loadfile. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Wing FTP Server 8.1.2 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().

The weakness was released by Ünsal Furkan Harani. The advisory is shared at vulncheck.com. This vulnerability is uniquely identified as CVE-2026-44403 since 05/05/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation needs additional levels of successful authentication. Technical details and a public exploit are known. MITRE ATT&CK project uses the attack technique T1059 for this issue.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 8.1.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (52589). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.7

VulDB Base Score: 4.7
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.2
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Exploit-DB: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FTP Server 8.1.3

Timelineinfo

05/05/2026 CVE reserved
05/12/2026 +7 days Advisory disclosed
05/12/2026 +0 days VulDB entry created
06/02/2026 +21 days VulDB entry last update

Sourcesinfo

Advisory: vulncheck.com
Researcher: Ünsal Furkan Harani
Status: Confirmed

CVE: CVE-2026-44403 (🔒)
GCVE (CVE): GCVE-0-2026-44403
GCVE (VulDB): GCVE-100-363381
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/12/2026 23:15
Updated: 06/02/2026 10:02
Changes: 05/12/2026 23:15 (78), 06/02/2026 10:02 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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