CVE-2024-46568
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 · uneditedDraytek Vigor 3910 v4.3.2.6 was discovered to contain a buffer overflow in the sPeerId parameter at vpn.cgi. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input.
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 buffer overflow vulnerability exists in the sPeerId parameter of vpn.cgi on Draytek Vigor 3910 v4.3.2.6 routers. Attackers can cause a Denial of Service by sending a crafted input that overflows the buffer in this parameter.
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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 device modelAccess the router's web interface or use SNMP/CLI to confirm the device is a Draytek Vigor 3910. This can typically be found in the system status page or by checking the device label.Affected if The device is not a Draytek Vigor 3910, then this specific CVE does not apply.
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Check the firmware versionIn the router web interface, go to System > Firmware or Status > System Information to find the exact firmware version installed. Alternatively, use the CLI command 'sys info' or check via SNMP.Affected if The installed firmware version is exactly 4.3.2.6 - other versions are not affected by this specific CVE.
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Verify VPN management interface accessibilityConfirm whether the vpn.cgi endpoint is accessible. This is typically found under the VPN configuration pages or by accessing the router's CGI bin directory over HTTP/HTTPS. Check firewall rules to see if port 443 or the VPN management port is exposed to untrusted networks.Affected if The vpn.cgi interface is reachable from an untrusted network, making the buffer overflow exploitable for Denial of Service.
You are affected if you are running Draytek Vigor 3910 firmware exactly version 4.3.2.6 AND the VPN management interface (vpn.cgi) is accessible on your device.
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 vendor-supplied firmware patch when available. Until then, restrict access to the VPN management interface via firewall rules or network segmentation to minimize exposure.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2024-46568 — 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-2024-46568 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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