CVE-2026-90864— Host Administrator Path Containment Bypass in Progress WS_FTP Server

Quick assessment

Affected

Progress Software WS_FTP Server

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Windows 操作系统上，Progress Software WS_FTP Server 2024.0.7 和 2025.0.4 之前的版本中存在一个路径遍历漏洞，该漏洞可能允许被授权的托管管理员访问或修改其授权范围之外的文件。

CVSS 9.1 · Critical Updated Oct 30, 2026

Possible ATT&CK Techniques 2 AI

T1083 · File and Directory Discovery T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Host Administrator Path Containment Bypass in Progress WS_FTP Server

Source: CVE Program / CVE List V5

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 or modify files outside their authorized scope.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

对路径名的限制不恰当(路径遍历)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Progress Software	WS_FTP Server	0 ~ 2024.0.7	-

II. Public POCs for CVE-2026-90864

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-90864

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Other References for CVE-2026-90864 (1)

https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-90864

Same Patch Batch · Progress Software · 2026-10-29 · 15 CVEs total

CVE-2026-84295	10.0 CRITICAL	Improper Authentication in Progress WS_FTP Server
CVE-2026-90868	9.9 CRITICAL	OS Command Injection in Progress WS_FTP Server
CVE-2026-90863	9.1 CRITICAL	Privilege Escalation via Missing Authorization in WS_FTP Manager
CVE-2026-90866	9.1 CRITICAL	Virtual Folder Path Confinement Bypass in Progress WS_FTP Server
CVE-2026-90865	9.0 CRITICAL	Command Injection via FTP Notification Variables in Progress WS_FTP Server
CVE-2026-90867	8.1 HIGH	Improper Access Control of Web Admin Console in Progress WS_FTP Server
CVE-2026-84294	7.7 HIGH	Information Disclosure in Ad Hoc Transfer in Progress WS_FTP Server
CVE-2026-90869	7.5 HIGH	Pre-Authentication SSH Denial of Service via Malformed Public-Key Signature in Progress WS
CVE-2026-84296	6.8 MEDIUM	SSH Multi-Factor Authentication Bypass in Progress WS_FTP Server
CVE-2026-90872	6.6 MEDIUM	Server-Side Script Injection in Manager Web UI in Progress WS_FTP Server
CVE-2026-90861	6.6 MEDIUM	Password Disclosure via Activity Logs Enabling Administrator Privilege Escalation in WS_FT
CVE-2026-90870	5.3 MEDIUM	Unauthenticated Ad Hoc Transfer Resource Exhaustion in Progress WS_FTP Server
CVE-2026-90871	5.3 MEDIUM	Path Traversal Leading to File Deletion in Ad Hoc Transfer and Web Transfer in Progress WS
CVE-2026-90862	4.3 MEDIUM	Web Transfer Module Multi-Factor Authentication Bypass in Progress WS_FTP Server

IV. Related Vulnerabilities

Same product: WS_FTP Server

Same vendor: Progress Software

Same weakness: CWE-22