Quick answers
- Is CVE-2026-90863 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-90863 being exploited in the wild.
- How severe is CVE-2026-90863?
- Critical severity, with a CVSS score of 9.1, published 29 October 2026.
- Which products and versions are affected?
- Progress Software WS FTP Server prior to 2024.0.7 and 2025.0.4 on Windows.
- Is there a fix for CVE-2026-90863?
- Yes: fixed in 2024.0.7, 2025.0.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-90863 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-90863?
- Check whether you run Progress Software WS FTP Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 2024.0.7, 2025.0.4
Technical details
A missing authorization vulnerability in the WS_FTP Server administrative interface fails to validate that delegated Host Administrators operate only within their authorized scope. An authenticated delegated administrator can exceed their assigned permissions to achieve arbitrary command execution with elevated privileges. The vulnerability is local to authenticated users with administrative access.
Affected products
- Progress Software WS_FTP Server prior to 2024.0.7 and 2025.0.4 on Windows
Timeline
- 2026-10-29: disclosed