Vulnerability-Lookup

GHSA-FJ2Q-V6CH-V3MG

Vulnerability from github – Published: 2026-10-28 15:31 – Updated: 2026-10-28 15:31

Details

Wing FTP Server does not verify user's base folder. An attacker with admin privileges can add user directories via scripts, allowing the added directories to escape the base folder. This allows the attacker to write files on the system and can lead to remote code execution with process owner privileges.Critically, since the installation guide mentions running the command with sudo, the files are created as “root.”

This issue was fixed in version 8.2.6.

Severity

9.4 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-105420"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-28T14:16:56Z",
    "severity": "CRITICAL"
  },
  "details": "Wing FTP Server does not verify user\u0027s base folder. An attacker with admin privileges can add user directories via scripts, allowing the added directories to escape the base folder. This allows the attacker to write files on the system and can lead to remote code execution with process owner privileges.Critically, since the installation guide mentions running the command with `sudo`, the files are created as \u201croot.\u201d\n\n\n\n\nThis issue was fixed in version 8.2.6.",
  "id": "GHSA-fj2q-v6ch-v3mg",
  "modified": "2026-10-28T15:31:53Z",
  "published": "2026-10-28T15:31:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105420"
    },
    {
      "type": "WEB",
      "url": "https://cert.pl/en/posts/2026/10/CVE-2026-105420"
    },
    {
      "type": "WEB",
      "url": "https://www.wftpserver.com"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-105420 (GCVE-0-2026-105420)

Vulnerability from cvelistv5 – Published: 2026-10-28 13:19 – Updated: 2026-10-28 13:19

Title

Path Traversal in Wing WFTP Server leading to Remote Code Execution

Summary

Severity

9.4 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

CERT-PL CNA under the ENISA root

CNA scorecard B 81/100 over 241 records in the last 180 days details

References

2 references

URL	Tags
https://cert.pl/en/posts/2026/10/CVE-2026-105420	third-party-advisory
https://www.wftpserver.com/	product

Impacted products

1 product

Vendor	Product	Version
Wing Soft Technology	Wing FTP Server	Affected: 0 , < 8.2.6 (semver) cpe:2.3:a:wing_soft_technology:wing_ftp_server::::::::

Credits

Olek Malinowski

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Wing FTP Server",
          "vendor": "Wing Soft Technology",
          "versions": [
            {
              "lessThan": "8.2.6",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:wing_soft_technology:wing_ftp_server:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "8.2.6",
                  "versionStartIncluding": "0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "OR"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Olek Malinowski"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Wing FTP Server does not verify user\u0027s base folder. An attacker with admin privileges can add user directories via scripts, allowing the added directories to escape the base folder. This allows the attacker to write files on the system and can lead to remote code execution with process owner privileges.\u003cdiv\u003eCritically, s\u003cspan\u003eince the installation guide mentions running the command with `sudo`, the files are created as \u201croot.\u201d\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan\u003eThis issue was fixed in version 8.2.6.\u003c/span\u003e\u003c/div\u003e"
            }
          ],
          "value": "Wing FTP Server does not verify user\u0027s base folder. An attacker with admin privileges can add user directories via scripts, allowing the added directories to escape the base folder. This allows the attacker to write files on the system and can lead to remote code execution with process owner privileges.Critically, since the installation guide mentions running the command with `sudo`, the files are created as \u201croot.\u201d\n\n\n\n\nThis issue was fixed in version 8.2.6."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-126",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-126 Path Traversal"
            }
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
              "value": "GENERAL"
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      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-22",
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              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T13:19:31.908Z",
        "orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
        "shortName": "CERT-PL"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://cert.pl/en/posts/2026/10/CVE-2026-105420"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.wftpserver.com/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Path Traversal in Wing WFTP Server leading to Remote Code Execution",
      "x_generator": {
        "engine": "Vulnogram 1.0.3"
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  "cveMetadata": {
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    "assignerShortName": "CERT-PL",
    "cveId": "CVE-2026-105420",
    "datePublished": "2026-10-28T13:19:31.908Z",
    "dateReserved": "2026-10-05T11:39:15.067Z",
    "dateUpdated": "2026-10-28T13:19:31.908Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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