---
id: "CVE-2026-90861"
kind: "vulnerability"
aliases: ["CVE-2026-90861"]
title: "WS_FTP Server: admin passwords may leak in clear text on Windows"
severity: "medium"
cvss: 6.6
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["file-transfer", "infrastructure", "windows", "ws_ftp"]
not_affected_if: ["non-windows-hosts", "single-admin"]
published_at: "2026-10-29T16:20:04+00:00"
first_seen_at: "2026-10-29T16:26:01+00:00"
updated_at: "2026-10-29T16:31:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90861", "first_seen_at": "2026-10-29T16:26:01+00:00"}]
---

# WS_FTP Server: admin passwords may leak in clear text on Windows

Progress WS_FTP Server on Windows can expose a user's password in clear text to another administrator. That administrator could use the password to gain broader control of the server.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed WS_FTP Server version against the fixed releases listed in the Fix section.
- Confirm the server runs on Windows, since the flaw is described for that platform.

## Fix

- WS_FTP Server `2024.0.7` for the 2024.0 line
- WS_FTP Server `2025.0.4` for the 2025.0 line

## Timeline

- 2026-10-29T16:26:01+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-90861

## From the sources

Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows may expose a user's password in clear text to another administrator, who could use it to gain broader administrative access to the server.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_