CVE-2026-90866 — CRITICAL (9.1)

Vulnerability 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.

CVSS Score

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

Related Weaknesses (CWE)

CWE-434 CWE-22

References

https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86I

FAQ

What is CVE-2026-90866?

CVE-2026-90866 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 author...

How severe is CVE-2026-90866?

CVE-2026-90866 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-90866?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.