CVE-2025-5219
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 has been found in FreeFloat FTP Server 1.0.0 and classified as critical. Affected by this vulnerability is an unknown functionality of the component ASCII Command Handler. The manipulation leads to buffer overflow. The attack can be launched 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 · moderate confidenceBuffer overflow vulnerability in FreeFloat FTP Server 1.0.0's ASCII Command Handler allows remote attackers to execute arbitrary code via specially crafted input. The vulnerability has a critical CVSS score of 9.8 and a publicly available exploit, making it highly exploitable in the wild.
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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Identify if FreeFloat FTP Server is installedCheck running processes or installed programs for FreeFloat FTP Server executable or service. Look for process named 'FreeFloat' or 'FreeFloatFtpServer' in Task Manager or via command: tasklist /FI "IMAGENAME eq *.exe"Affected if FreeFloat FTP Server process is running on the system
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Confirm the installed versionRight-click the executable and select Properties, or use: wmic product get name,version. Compare the version number to the affected range (1.0)Affected if Version is 1.0 (exact match to affected version)
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Verify FTP service is listening and accessibleCheck if FTP port (default 21) is open and listening: netstat -an | findstr :21. Test connectivity: telnet <server-ip> 21Affected if FTP service is listening on a port and responds to connection attempts
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Determine if server is network-accessibleCheck firewall rules or network exposure: netsh advfirewall firewall show rule name=all. Verify the FTP server is reachable from external network segments if not intended for local use onlyAffected if FTP server is accessible from network segments beyond localhost
You are affected if FreeFloat FTP Server version 1.0 is running and accessible on your network, as the buffer overflow in the ASCII Command Handler is triggered by connecting to the FTP service.
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 dataReplace FreeFloat FTP Server with a maintained alternative or apply vendor patches if available; until then, disable the service, isolate on a restricted network segment, and implement严格的入站访问控制以减少暴露面.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-5219 — 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-2025-5219 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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