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4.3
MEDIUM CVSS 3.1
CVE-2026-90862
Web Transfer Module Multi-Factor Authentication Bypass in Progress WS_FTP Server
Overview
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.

Details
INFO

Published Date :

Oct. 29, 2026, 4:20 p.m.

Last Modified :

Oct. 29, 2026, 4:24 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-90862 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Progress ws_ftp_server
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM f9fea0b6-671e-4eea-8fde-31911902ae05
CVSS 3.1 MEDIUM MITRE-CVE
CVSS 3.1 MEDIUM [email protected]
Solution
Update WS_FTP Server to patch improper authentication flaws related to MFA.
  • Update WS_FTP Server to version 2024.0.7 or 2025.0.4.
  • Ensure multi-factor authentication is properly configured.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-90862.

URL Resource
https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-90862 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-90862 weaknesses.

CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data Utilizing REST's Trust in the System Resource to Obtain Sensitive Data CAPEC-94: Adversary in the Middle (AiTM) Adversary in the Middle (AiTM) CAPEC-114: Authentication Abuse Authentication Abuse CAPEC-115: Authentication Bypass Authentication Bypass CAPEC-151: Identity Spoofing Identity Spoofing CAPEC-194: Fake the Source of Data Fake the Source of Data CAPEC-593: Session Hijacking Session Hijacking CAPEC-633: Token Impersonation Token Impersonation CAPEC-650: Upload a Web Shell to a Web Server Upload a Web Shell to a Web Server CAPEC-16: Dictionary-based Password Attack Dictionary-based Password Attack CAPEC-49: Password Brute Forcing Password Brute Forcing CAPEC-55: Rainbow Table Password Cracking Rainbow Table Password Cracking CAPEC-70: Try Common or Default Usernames and Passwords Try Common or Default Usernames and Passwords CAPEC-509: Kerberoasting Kerberoasting CAPEC-555: Remote Services with Stolen Credentials Remote Services with Stolen Credentials CAPEC-560: Use of Known Domain Credentials Use of Known Domain Credentials CAPEC-561: Windows Admin Shares with Stolen Credentials Windows Admin Shares with Stolen Credentials CAPEC-565: Password Spraying Password Spraying CAPEC-600: Credential Stuffing Credential Stuffing CAPEC-644: Use of Captured Hashes (Pass The Hash) Use of Captured Hashes (Pass The Hash) CAPEC-645: Use of Captured Tickets (Pass The Ticket) Use of Captured Tickets (Pass The Ticket) CAPEC-652: Use of Known Kerberos Credentials Use of Known Kerberos Credentials CAPEC-653: Use of Known Operating System Credentials Use of Known Operating System Credentials

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-90862 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-90862 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by [email protected]

    Oct. 29, 2026

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
    Added CWE CWE-287
    Added CWE CWE-308
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/90xxx/CVE-2026-90862.json">CVE-2026-90862</a>
    Added Reference https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 4.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact