---
title: "CVE-2026-90864: Progress Software WS_FTP Server - Path Traversal"
description: "Progress Software WS_FTP Server < 2024.0.7 and < 2025.0.4 on Windows contains a path traversal caused by improper access control, letting delegated Host Administrators access or modify files outside their authorized scope, exploit requires delegated Host Administrator privileges."
url: https://panop.io/threat-heartbeat/CVE-2026-90864/
---

# CVE-2026-90864 Progress Software WS\_FTP Server - Path Traversal

Progress Software WS\_FTP Server < 2024.0.7 and < 2025.0.4 on Windows contains a path traversal caused by improper access control, letting delegated Host Administrators access or modify files outside their authorized scope, exploit requires delegated Host Administrator privileges.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.48% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90864)

## Details

Type

Path Traversal

Impact

File System Read, File System Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Published

29 October 2026

Updated

31 October 2026

Weakness

[CWE-22](https://cwe.mitre.org/data/definitions/22.html)

## Vendor fix

Upgrade to versions 2024.0.7 or 2025.0.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90864](https://nvd.nist.gov/vuln/detail/CVE-2026-90864)
- [https://progress.lightning.force.com/lightning/r/Knowledge\_\_kav/ka7Pb000001vl86IAA/view](https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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