CVE-2026-90869

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductWS_FTP Server

PublishedOct 29, 2026

First seenNov 4, 2026

Weakness typeCWE-125Out-of-bounds read CWE-20Improper input validation

How to fix

Update

Progress Software WS_FTP Server2024.0.7, 2025.0.4 or later

Vendor advisories

progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view

Affected products

Product	Affected versions	Fixed in
Progress Software WS_FTP Server	v < 2024.0.7, v < 2025.0.4	2024.0.7, 2025.0.4

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