CVE-2025-5664
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 · uneditedA vulnerability was found in FreeFloat FTP Server 1.0 and classified as critical. This issue affects some unknown processing of the component RESTART Command Handler. The manipulation leads to buffer overflow. The attack may be initiated 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 confidenceA buffer overflow vulnerability exists in the RESTART command handler of FreeFloat FTP Server 1.0, allowing remote attackers to potentially execute arbitrary code due to improper bounds checking when processing the RESTART command. The public exploit availability and CVSS 9.8 score indicate immediate exploitation risk.
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= 1.0CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Confirm FreeFloat FTP Server is installedCheck running processes for 'freefloat.exe' or look for FreeFloat FTP Server in installed programs via Control Panel > Programs and FeaturesAffected if FreeFloat FTP Server is present on the system
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Verify the installed version is 1.0Right-click the FreeFloat executable, select Properties, and check the Details tab for version information, or run 'freefloat.exe -v' if a version flag is supportedAffected if Version is exactly 1.0
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Confirm the FTP service is running and accessibleRun 'netstat -an | findstr :21' to check if port 21 is listening, or use Telnet or an FTP client to connect to the serverAffected if FTP service is listening on any network interface (including localhost)
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Check if RESTART command is functionalConnect to the FTP server and issue the 'REST' command followed by a byte offset (e.g., 'REST 100') to see if the server accepts itAffected if The REST command is accepted and responds without error
If FreeFloat FTP Server version 1.0 is running and the REST command is accessible (even on localhost), the environment is affected by CVE-2025-5664.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor dataSince FreeFloat FTP Server is abandoned and no patch is available, migrate to a supported FTP server (e.g., FileZilla Server, ProFTPD) and implement network-level access controls to reduce attack surface until migration is complete.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-5664 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-5664 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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