Missing Authorization in Progress Software WS_FTP Server
CVE-2026-90863

9.1CRITICAL

Key Information:

Vendor

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

What is CVE-2026-90863?

A missing authorization flaw in the administrative interface of Progress Software's WS_FTP Server allows a delegated Host Administrator to manipulate system settings beyond their intended permissions. This vulnerability can lead to arbitrary command execution, granting unauthorized users the ability to execute operations with elevated privileges, thereby risking the complete compromise of the underlying server.

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:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Niv Levy (restricted)
.