CVE-2024-41586
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 stack-based Buffer Overflow vulnerability in DrayTek Vigor310 devices through 4.3.2.6 allows a remote attacker to execute arbitrary code via a long query string to the cgi-bin/ipfedr.cgi component.
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 confidenceA stack-based buffer overflow in DrayTek Vigor310 devices (versions through 4.3.2.6) in the cgi-bin/ipfedr.cgi component allows remote attackers to execute arbitrary code via a specially crafted long query string. The vulnerability stems from insufficient bounds checking when processing user-supplied query string parameters, allowing a stack buffer to be overflowed and enabling arbitrary code execution.
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<= 4.3.2.6CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:L/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 the DrayTek device modelAccess the device's web interface or check the device label to confirm the exact model (Vigor310 or Vigor3910)Affected if The device is a DrayTek Vigor310 or Vigor3910 series router
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Check the installed firmware versionLog into the web interface and navigate to System Maintenance > Firmware Upgrade, or use the router's status page to view the current firmware versionAffected if The firmware version is 4.3.2.6 or lower
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Verify ipfedr.cgi is accessibleAttempt to access the URI /cgi-bin/ipfedr.cgi on the device (e.g., http://<device-ip>/cgi-bin/ipfedr.cgi) using a web browser or curl commandAffected if The CGI script responds (returns any HTTP response, even an error) indicating it is present and accessible
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Confirm web interface exposureCheck if the router's web interface (ports 80/443 or custom HTTP port) is accessible from untrusted networks by reviewing firewall rules or network configurationAffected if The web interface is exposed to networks other than trusted management networks
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Inspect for abnormal query string handling logsReview router logs (System Maintenance > Logs) for any unusual entries related to ipfedr.cgi, long query strings, or crashes in the cgi-bin directoryAffected if Logs show evidence of malformed requests to ipfedr.cgi or CGI process instability
You are affected if you have a DrayTek Vigor310 or Vigor3910 device running firmware version 4.3.2.6 or lower with the ipfedr.cgi component accessible from your network.
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 dataApply the latest firmware update from DrayTek when available. Until then, restrict network access to the device's web interface, disable the ipfedr.cgi component if possible, and consider deploying WAF rules to filter abnormally long query strings.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2024-41586 — 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-2024-41586 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
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