Improper Authentication Vulnerability in Progress Software WS_FTP Server
CVE-2026-90862

4.3MEDIUM

Key Information:

Vendor

Progress Software
Status
Ws Ftp Server
Vendor
CVE Published:
29 October 2026

What is CVE-2026-90862?

The Web Transfer Module of Progress Software's WS_FTP Server has a critical flaw related to improper authentication. Versions prior to 2024.0.7 and 2025.0.4 on Windows are susceptible to this vulnerability. Attackers with knowledge of a user's password may exploit this weakness to access specific files tied to that account bypassing essential multi-factor authentication measures, potentially jeopardizing sensitive data integrity and confidentiality.

Affected Version(s)

WS_FTP Server Windows 0 < 2024.0.7

WS_FTP Server Windows 0 < 2025.0.4

References

https://progress.lightning.force.com/lightning/r/Knowledg...
vendor-advisory

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Tanishq Shah (tanishqshah)
.