Progress WS_FTP Server: OS command injection on Windows
Summary
An OS command injection vulnerability in Progress WS_FTP Server on Windows allows arbitrary command execution under certain configurations. The CVSS vector is network-reachable with low attack complexity, but it requires low privileges, so an attacker needs a valid account. The flaw is fixed in the same release as the more severe, unauthenticated CVE-2026-84295, so patching the server addresses both.
Affected
- Progress Software WS_FTP Server on Windows, versions prior to 2024.0.7 (2024.x branch)
- Progress Software WS_FTP Server on Windows, versions prior to 2025.0.4 (2025.x branch)
- The required configurations are not publicly specified.
Fixed in
- Upgrade to 2024.0.7 or 2025.0.4 (or later).
- Whether older branches receive patches is unknown.
Workaround
- Unknown. No vendor-documented workaround was found.
- Contact Progress Software Technical Support for guidance on available mitigations.
Exploitation
- No known exploitation in the wild as of 30 October 2026.
- CISA KEV: not listed. EUVD: exploitation not available.
- VulDB labels the entry 0-Day, which describes disclosure status and not confirmed exploitation.
- No public proof of concept was found; this is unknown rather than confirmed absent.
Our recommendation
- Inventory all WS_FTP Server instances and their versions, and identify internet-facing systems.
- Patch to 2024.0.7 or 2025.0.4 (or later), starting with externally exposed systems, and verify the installed version afterwards.
- Review accounts and logs on affected hosts for unexpected activity.
- Check the Progress advisory for interim measures and re-check CISA KEV for changes.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Progress Knowledge Base advisory progress.lightning.force.com
- CVE record (threatint) cve.threatint.com
- Strix CVE-2026-90868 www.strix.ai
- VulDB entry vuldb.com
- EUVD euvd.enisa.europa.eu
- Security Online article on WS_FTP fixes securityonline.info
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 30 Oct 2026, 14:46.
Original description (NVD)
An OS command injection vulnerability in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow arbitrary command execution under certain configurations.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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