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Freefloat Ftp ServerApplication · Freefloat

CVE-2025-5665

CRITICAL · 9.8 CVSS v3.1 Published 2025-06-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability was found in FreeFloat FTP Server 1.0. It has been classified as critical. Affected is an unknown function of the component XCWD Command Handler. The manipulation leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A buffer overflow vulnerability exists in the XCWD command handler of FreeFloat FTP Server 1.0. The vulnerability can be exploited remotely without authentication, potentially allowing an attacker to execute arbitrary code on the affected system. The exploit has been publicly disclosed, lowering the barrier for exploitation.

MitigationDue to the critical severity and public exploit availability, immediate network isolation or discontinuation of FreeFloat FTP Server is recommended. If continued use is required, implement strict firewall rules limiting FTP access to authorized IPs only, or migrate to a actively maintained FTP server solution.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Freefloat Ftp ServerApplication
Affected:= 1.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if FreeFloat FTP Server is running
    Open Task Manager or use command 'tasklist | findstr -i freefloat' to check for the FTP server process
    Affected if The FreeFloat FTP Server process (typically freefloat.exe or ftpserver.exe) is running on the system
  2. Determine the installed version
    Right-click the executable file, select Properties, then check the Details tab for version information. Alternatively, use 'wmic product where "name like '%FreeFloat%'" get version' if installed via Windows Installer
    Affected if The version is reported as 1.0 exactly
  3. Verify FTP service is network accessible
    Use 'netstat -an | findstr :21' to confirm the server is listening on port 21, or attempt a connection with an FTP client to the server's IP address on port 21
    Affected if The FTP service is listening on port 21 and accepting connections, making the XCWD command handler reachable remotely

If FreeFloat FTP Server version 1.0 is running and accessible on the network, the environment is affected by CVE-2025-5665.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Due to the critical severity and public exploit availability, immediate network isolation or discontinuation of FreeFloat FTP Server is recommended. If continued use is required, implement strict firewall rules limiting FTP access to authorized IPs only, or migrate to a actively maintained FTP server solution.

Recommended fix Moderate confidence
  1. 1. Immediately disconnect the affected server from the network to prevent active exploitation.
  2. 2. Identify all systems running FreeFloat FTP Server version 1.0.
  3. 3. Replace FreeFloat FTP Server with a actively maintained FTP server solution (such as FileZilla Server, vsftpd, or ProFTPD) that receives security updates.
  4. 4. If temporary continued use is absolutely necessary, implement network-level access controls restricting FTP access to only explicitly authorized IP addresses.
  5. 5. Deploy an intrusion detection system (IDS) to monitor for indicators of compromise targeting the XCWD command handler.
  6. 6. AuditFTP server logs for signs of exploitation attempts.
  7. 7. After migration, securely decommission the FreeFloat FTP Server installation.
Caveat No upgrade path available - FreeFloat FTP Server 1.0 is an obsolete product with no known patched version; replacement with an actively-maintained alternative is required

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Freefloat Ftp Server Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-5665 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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