---
id: CVE-2026-102722
title: >-
  In the IPv4 PASV path, the FTP Client accepts whatever address was sent in the
  server's `227` reply
summary: >-
  In the IPv4 PASV path, the FTP Client accepts whatever address was sent in the
  server's `227` reply. Validation only covers the parse and the non-zero
  values, thus a malicious server can name any address and direct the Client
  there.
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-918
vendor: Eclipse Foundation
product: NetX Duo
affected:
  - netx_duo <= 6.5.1.202602
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T18:17:11.693'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102722'
references:
  - url: >-
      https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-j6g2-8fm3-rm8m
    label: emo@eclipse.org
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-29T18:42:35.816Z'
---

## Overview

In the IPv4 PASV path, the FTP Client accepts whatever address was sent in the server's `227` reply. Validation only covers the parse and the non-zero values, thus a malicious server can name any address and direct the Client there.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.