CVE-2024-6421
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 · uneditedAn unauthenticated remote attacker can read out sensitive device information through a incorrectly configured FTP service.
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 confidenceAn unauthenticated remote attacker can read sensitive device information due to an incorrectly configured FTP service that allows anonymous or unauthenticated access to potentially privileged data.
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<= 2.11.0<= 2.11.0<= 2.11.0<= 2.11.0CVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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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Check device firmware versionAccess the Pepperl Fuchs device web interface or management console and locate the firmware version information, typically found under System, Device Info, or About sectionsAffected if The firmware version displayed is 2.11.0 or lower
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Identify if FTP service is enabledAccess the device configuration panel and look for FTP server settings, typically under Network Services, Protocols, or Server settingsAffected if FTP service is listed as enabled or active on the device
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Verify FTP anonymous access configurationCheck the FTP server settings in the device configuration for options named Anonymous Access, Allow Anonymous, or Unauthenticated FTPAffected if Anonymous or unauthenticated FTP access is permitted in the configuration
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Test FTP access without credentialsAttempt to connect to the device FTP port (typically port 21) using an FTP client without providing any username or password, and list accessible directoriesAffected if The FTP server accepts the connection and displays directories or files without requiring authentication
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Inspect FTP directory contents for sensitive dataIf anonymous FTP access is granted, navigate through the accessible directories and note what files or device information is visibleAffected if Sensitive device configuration files, diagnostics data, or privileged information is accessible via the unauthenticated FTP connection
The device is affected if it runs firmware version 2.11.0 or lower AND has FTP service enabled with anonymous or unauthenticated access permitted, allowing exposure of sensitive device data without credentials.
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 dataSecure the FTP service by disabling anonymous access, enforcing authentication, restricting user permissions to minimum necessary, and reviewing FTP directory access controls.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-6421 — 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-2024-6421 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data