# CVE-2026-90865: Progress WS_FTP Server OS command injection on Windows

Source: https://junglewise.ai/threats/cve-2026-90865-an-os-command-injection-vulnerability-in-progress-software-ws-ftp  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-29. Updated: 2026-10-29  
License: CC BY 4.0 with a link back

CVE-2026-90865 · Severity: critical · CVSS 9 · Published 2026-10-29

WS_FTP Server is a file transfer server for Windows environments. An OS command injection vulnerability allows attackers to execute arbitrary commands with elevated privileges on affected systems. This could lead to complete system compromise, data exfiltration, or deployment of ransomware.

Technologies: [Progress Software WS FTP Server](https://junglewise.ai/threats/technologies/progress-software-ws-ftp-server). Vendors: [Progress Software](https://junglewise.ai/threats/vendors/progress-software).

## Quick answers

**Is CVE-2026-90865 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90865 being exploited in the wild.

**How severe is CVE-2026-90865?** Critical severity, with a CVSS score of 9, published 29 October 2026.

**Which products and versions are affected?** Progress Software WS FTP Server prior to 2024.0.7 and 2025.0.4.

**Is there a fix for CVE-2026-90865?** 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-2026-90865 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-90865?** 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

An OS command injection flaw in Progress WS_FTP Server on Windows (versions before 2024.0.7 and 2025.0.4) enables arbitrary command execution with elevated privileges under certain configurations. The vulnerability requires specific configuration conditions to be exploitable. A fix is available in versions 2024.0.7 and 2025.0.4.

## Affected products

- Progress Software WS_FTP Server prior to 2024.0.7 and 2025.0.4

## Timeline

- 2026-10-29: disclosed

## References

- [https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view](https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view)

## Related threats

- [Progress Software WS_FTP Server access restriction bypass in Thin Client Web Transfer](https://junglewise.ai/threats/cve-2026-115341-improper-access-restrictions-in-the-thin-client-web-transfer)
- [Progress Software WS_FTP Server sensitive data exposure in temp file](https://junglewise.ai/threats/cve-2026-115340-progress-software-ws-ftp-server-versions-prior-to-2025-0-5-on)
- [Progress Software WS_FTP Server denial of service via insufficient resource limits](https://junglewise.ai/threats/cve-2026-115339-insufficient-resource-limits-in-progress-software-ws-ftp-server)
- [Progress WS_FTP Server incorrect quota accounting](https://junglewise.ai/threats/cve-2026-115336-incorrect-quota-accounting-in-progress-software-ws-ftp-server)
- [Progress Software WS_FTP Server code injection in Manager web console](https://junglewise.ai/threats/cve-2026-90872-improper-neutralization-of-directives-in-dynamically-evaluated)