7.5
HighCVSS 3.1 · from ProgressSoftware
CVE-2026-90869
Pre-Authentication SSH Denial of Service via Malformed Public-Key Signature in Progress WS_FTP Server
WS_FTP Server · Out-of-bounds read · CWE-125AffectedWS_FTP Server
FixUpdate to 2024.0.7, 2025.0.4 or newer
PublishedOct 29, 15:54 · ProgressSoftware
ScoredOct 29 · 7.5 · ProgressSoftware
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:05 UTC
What we know
No known exploitation. CISA KEV, checked 22:05 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.
A successful attack can take the service down. CVSS impact.
Description
A remote attacker who knows a valid account's enrolled SSH public key can terminate the shared SSH service in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows.
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