CVE-2026-90866: critical vulnerability in Progress Software WS_FTP Server
Virtual Folder Path Confinement Bypass in Progress WS_FTP Server
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 0.7%
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:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products
Progress Software · WS_FTP ServerRelated CVEs — Progress Software WS_FTP Server
In the same product, most dangerous first.
CVE-2026-90868CRITICALOS Command Injection in Progress WS_FTP ServerEPSS 1.5%CVE-2026-90865CRITICALCommand Injection via FTP Notification Variables in Progress WS_FTP ServerEPSS 1.1%CVE-2026-90863CRITICALPrivilege Escalation via Missing Authorization in WS_FTP ManagerEPSS 0.7%CVE-2026-84295CRITICALImproper Authentication in Progress WS_FTP ServerEPSS 0.6%CVE-2026-90864CRITICALHost Administrator Path Containment Bypass in Progress WS_FTP ServerEPSS 0.5%CVE-2026-90867HIGHImproper Access Control of Web Admin Console in Progress WS_FTP ServerEPSS 0.4%