What is CVE-2026-90869?

CVE-2026-90869 is a high-severity vulnerability in Progress Software Ws FTP Server, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-10-29.

How severe is CVE-2026-90869?

High severity. CVSS v3 base score is 7.5 out of 10.

Out-of-bounds Read in Progress Software Ws FTP Server

CVE-2026-90869

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-10-29 · last modified 2026-10-29.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Progress Software Ws FTP Server

Weakness classification (CWE)

References

progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view (vendor-advisory)

Frequently asked questions

What is CVE-2026-90869?: CVE-2026-90869 is a high-severity vulnerability in Progress Software Ws FTP Server, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-10-29.
How severe is CVE-2026-90869?: High severity. CVSS v3 base score is 7.5 out of 10.