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CVE-2026-84296— SSH 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.

Progress Software WS_FTP Server 的 SSH 组件中存在多因素认证（MFA）绕过漏洞，影响 Windows 平台上 2024.0.6 之前的版本以及 2025.0.3 版本。该漏洞允许已认证用户通过账户间认证因素的错误关联，绕过多因素认证要求。

CVSS 6.8 · Medium
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I. Basic Information for CVE-2026-84296

Vulnerability Information
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Vulnerability Title
SSH Multi-Factor Authentication Bypass in Progress WS_FTP Server
Source: CVE Program / CVE List V5
Vulnerability Description
Multi-Factor Authentication Bypass vulnerability in SSH component in Progress Software WS_FTP Server versions prior to 2024.0.6, and 2025.0.3 on Windows allows authenticated users to bypass MFA requirements through improper association of authentication factors between accounts.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证算法的不正确实现
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Progress Software WS_FTP Server 0 ~ 2024.0.6 -

II. Public POCs for CVE-2026-84296

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III. Intelligence Information for CVE-2026-84296

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Other References for CVE-2026-84296 (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-2026-90872 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-303