CVE-2007-2796
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 · uneditedArris Cadant C3 CMTS allows remote attackers to cause a denial of service (service termination) via a malformed IP packet with an invalid IP option.
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 · high confidenceThe Arris Cadant C3 CMTS (Cable Modem Termination System) contains a vulnerability where processing malformed IP packets with invalid IP options causes the service to terminate, resulting in denial of service. The vulnerability is exploitable remotely without authentication, consistent with the high CVSS score indicating network-level attack vector and complete availability impact.
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
- Complete
AV:N/AC:L/Au:N/C:N/I:N/A:C
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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Confirm device modelIdentify the device in your network infrastructure. Look for Arris Cadant C3 CMTS hardware or check network inventory/asset management records for this specific model designation.Affected if The device is an Arris Cadant C3 CMTS
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Verify device is operationalCheck if the CMTS device is powered on and running by pinging its management IP address or attempting to access its management interface.Affected if The device responds to network requests and is currently in service
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Confirm service availabilityAttempt to access the CMTS management interface via web or CLI, or check if cable modem registration services are functioning.Affected if The CMTS service is running and accessible on the network
If the device in your environment is an Arris Cadant C3 CMTS that is powered on and providing services, it is affected by this vulnerability since all versions are impacted.
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 dataIf the device is still in production, apply any available vendor firmware updates. At network perimeter, implement filtering of malformed IP packets with invalid options if the CMTS device supports such controls or via upstream network devices. Given this is 2007-era legacy hardware, seriously consider replacement with current-generation equipment.
- 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-2007-2796 — 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-2007-2796 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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- Version or environment caveats, and links to real fixes
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