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CVE-2026-90862— Web Transfer Module Multi-Factor Authentication 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 平台上，Progress Software WS_FTP Server 2024.0.7 之前版本以及 2025.0.4 之前版本的 Web 传输模块存在身份验证不当漏洞。该漏洞允许攻击者在获取用户密码后，无需满足多因素认证（MFA）要求，即可访问与该账户关联的特定文件。

CVSS 4.3 · Medium
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I. Basic Information for CVE-2026-90862

Vulnerability Information
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Vulnerability Title
Web Transfer Module Multi-Factor Authentication Bypass in Progress WS_FTP Server
Source: CVE Program / CVE List V5
Vulnerability Description
Improper authentication in the Web Transfer Module of Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow an attacker with a user’s password to access certain files associated with that account without satisfying multi-factor authentication requirements.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
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-2026-90862

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III. Intelligence Information for CVE-2026-90862

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Other References for CVE-2026-90862 (1)

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-2026-90864 9.1 CRITICAL Host Administrator Path Containment Bypass in Progress WS_FTP Server
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

IV. Related Vulnerabilities

Same product: WS_FTP Server
Same vendor: Progress Software
Same weakness: CWE-287