CVE-2007-6040
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 · uneditedThe Belkin F5D7230-4 Wireless G Router allows remote attackers to cause a denial of service (degraded networking and logging) via a flood of TCP SYN packets, a related issue to CVE-1999-0116.
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 confidenceThe Belkin F5D7230-4 Wireless G Router is vulnerable to a denial of service attack where remote attackers can flood the device with TCP SYN packets, causing degraded network performance and impacting logging functionality. This is a classic SYN flood attack that overwhelms the router's ability to handle incoming connections.
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 dataall versionsCVSS 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
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Partial
AV:N/AC:L/Au:N/C:N/I:N/A:P
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.
-
Identify the router modelLocate the physical device or check network documentation to confirm the exact model number is Belkin F5D7230-4. Look for the model label on the device bottom or in the administration interface under System or Status.Affected if The device is a Belkin F5D7230-4 router (all versions are affected).
-
Determine WAN exposureCheck the router's WAN/Internet interface configuration. Log into the router admin panel and look for the WAN IP address. Determine if this IP is directly reachable from the Internet or behind another firewall/NAT device.Affected if The router's WAN interface has a public IP and is directly exposed to the Internet without an upstream protective device.
-
Check for network performance degradationObserve network performance during normal operation. Use ping tests and speed tests to establish baselines. Monitor for sudden drops in throughput or increased latency, particularly when the router is under load.Affected if Users experience unexplained network slowdown, packet loss, or latency spikes that correlate with incoming traffic bursts.
-
Inspect router logs for SYN anomaliesAccess the router's system logs through the admin interface (typically at 192.168.2.1) and look for entries indicating high connection counts, resource exhaustion, or failed logging. Check if logs show excessive half-open connections.Affected if Logs show abnormally high numbers of pending TCP connections, memory warnings, or gaps in logging activity indicating the logging subsystem is overwhelmed.
-
Monitor WAN interface trafficUse a network sniffer or traffic analysis tool on the WAN link to capture packet statistics. Look for a high volume of incoming SYN packets relative to other traffic, particularly from multiple source IPs.Affected if Packet capture reveals a flood of SYN packets from many sources creating half-open TCP connections faster than the router can process them.
If you have a Belkin F5D7230-4 router directly exposed to the Internet and are experiencing unexplained network degradation, high connection counts, or logging gaps, your environment is likely affected by this vulnerability.
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 dataImplement SYN rate-limiting or SYN cookies at the network perimeter firewall to filter malicious SYN floods, and consider deploying an intrusion prevention system to detect and block volumetric attacks. If no firmware update is available, replacing the legacy device with a current model that supports modern DoS protections is recommended.
- Consultation2.0 h
- Implementation4.0 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 $2,560.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2007-6040 — 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-2007-6040 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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