CVE-2026-90863: critical vulnerability in Progress Software WS_FTP Server
Privilege Escalation via Missing Authorization in WS_FTP Manager
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%
Missing authorization in the administrative interface of Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow a delegated Host Administrator to exceed their authorized scope, potentially enabling arbitrary command execution with elevated privileges and complete compromise of the underlying server.
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-2026-90866CRITICALVirtual Folder Path Confinement Bypass in Progress WS_FTP ServerEPSS 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%