CVE-2026-90866 Virtual Folder Path Confinement Bypass in Progress WS_FTP Server

CriticalCVSS 9.1 EPSS 0.73%

Published: 2026-10-29 17:52
Updated: 2026-10-30 20:18
Exploit status: No public exploit known

Description

A path traversal vulnerability in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow a delegated Host Administrator to access locations outside their authorized scope, potentially enabling remote code execution.

Affected products

Product	Affected versions	Fixed in
Progress Software WS_FTP Server	< 2024.0.7	2024.0.7
Progress Software WS_FTP Server	< 2025.0.4	2025.0.4

References

progress.lightning.force.com vendor-advisory

CVSS v3.1

9.1 Critical

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Changed
Confidentiality: High
Integrity: High
Availability: High

All scores (2)

v3.1 9.1 · progresssoftware
v3.1 9.1 · security@progress.com

Weakness & likelihood

EPSS (exploitation probability, 30 days): 0.73% (percentile 54.8)
CWE: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-434 Unrestricted Upload of File with Dangerous Type

Public exploit references

Metadata only. CVERadar never hosts or runs exploit code.

No public exploit references known.