CVE-2026-90870Unauthenticated Ad Hoc Transfer Resource Exhaustion in Progress WS_FTP Server

Description

A missing release of backend receiver sessions in the Ad Hoc Transfer component of Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could lead to server resource exhaustion and service degradation.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view vendor-advisory