CVE-2026-90866 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 unauthorized locations, exploit requires delegated Host Administrator privileges.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.73% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
File System Read, Remote Code Execution
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

Vendor fix

Update 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

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