---
id: "CVE-2026-90865"
kind: "vulnerability"
aliases: ["CVE-2026-90865"]
title: "WS_FTP Server: OS command injection lets attackers run commands on Windows"
severity: "critical"
cvss: 9.0
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["file-transfer", "package", "windows", "ws_ftp_server"]
not_affected_if: ["non-windows-host"]
published_at: "2026-10-29T16:20:04+00:00"
first_seen_at: "2026-10-29T16:26:02+00:00"
updated_at: "2026-10-29T16:27:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90865", "first_seen_at": "2026-10-29T16:26:02+00:00"}]
---

# WS_FTP Server: OS command injection lets attackers run commands on Windows

WS_FTP Server is a file transfer product from Progress Software. An OS command injection flaw lets an attacker run arbitrary commands with elevated privileges on a Windows host under certain configurations.

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

## How to check

- Check the installed WS_FTP Server version in the product's About or admin console and compare it to `2024.0.7` and `2025.0.4`.
- Confirm whether the server runs on Windows and which configuration the sources' 'certain configurations' refers to: unknown.

## Fix

- WS_FTP Server prior to `2024.0.7` on the 2024 branch: move to `2024.0.7` or later.
- WS_FTP Server prior to `2025.0.4` on the 2025 branch: move to `2025.0.4` or later.

## Timeline

- 2026-10-29T16:26:02+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-90865

## From the sources

An OS command injection vulnerability in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow arbitrary command execution with elevated privileges under certain configurations.

---

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