CVEsProgress SoftwareCVE-2026-90870Published Oct 29, 15:55 · Updated Oct 30, 17:15 UTC
5.3
MediumCVSS 3.1 · from ProgressSoftware
CVE-2026-90870

Unauthenticated Ad Hoc Transfer Resource Exhaustion in Progress WS_FTP Server

WS_FTP Server · Uncontrolled resource use · CWE-400
AffectedWS_FTP Server
FixUpdate to 2024.0.7, 2025.0.4 or newer
PublishedOct 29, 15:55 · ProgressSoftware
ScoredOct 29 · 5.3 · ProgressSoftware
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:06 UTC

What we know

No known exploitation. CISA KEV, checked 22:06 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.

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.

From ProgressSoftware

Affected and fixed versions

ProductAffectedFixed inWS_FTP Serverbefore 2024.0.72024.0.7WS_FTP Serverbefore 2025.0.42025.0.4

Exploit code

Exploit-DBnone knownMetasploitnone knownNucleinone known

References

progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view · progress.lightning.force.comvendor advisory

Other CVEs in WS_FTP Server

All 14 →
6.6Server-Side Script Injection in Manager Web UI in Progress WS_FTP Server · CVE-2026-90872Oct 295.3Path Traversal Leading to File Deletion in Ad Hoc Transfer and Web Transfer in Progress WS_FTP Server · CVE-2026-90871Oct 297.5Pre-Authentication SSH Denial of Service via Malformed Public-Key Signature in Progress WS_FTP Server · CVE-2026-90869Oct 29