CVE-2017-18836
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 · uneditedCertain NETGEAR devices are affected by denial of service. This affects M4300-28G before 12.0.2.15, M4300-52G before 12.0.2.15, M4300-28G-POE+ before 12.0.2.15, M4300-52G-POE+ before 12.0.2.15, M4300-8X8F before 12.0.2.15, M4300-12X12F before 12.0.2.15, M4300-24X24F before 12.0.2.15, M4300-24X before 12.0.2.15, M4300-48X before 12.0.2.15, and M4200 before 12.0.2.15.
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 confidenceDenial of service vulnerability in NETGEAR M4300 series switches and M4200. The issue exists in firmware versions prior to 12.0.2.15 and allows an attacker to cause the affected devices to become unresponsive, likely through malformed network traffic or specific request handling.
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< 12.0.2.15< 12.0.2.15< 12.0.2.15< 12.0.2.15< 12.0.2.15< 12.0.2.15< 12.0.2.15< 12.0.2.15CVSS 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/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 device web interface or CLI and confirm the exact model number. Affected models are: M4300 28g, M4300 52g, M4300 28g Poe+, M4300 52g Poe+, M4300 8x8f, M4300 12x12f, M4300 24x24f, M4300 24x, and M4200.Affected if Device is any of the listed M4300 variants or M4200
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Locate the firmware versionIn the device web interface, go to System Information or Maintenance section to view the current firmware version. Alternatively, access the CLI and use 'show version' or 'show system' command to retrieve the firmware build number.Affected if Firmware version cannot be determined or is lower than 12.0.2.15
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Compare version to affected rangeIf a firmware version is displayed, compare it numerically against 12.0.2.15. Any version lower than 12.0.2.15 (including beta, beta2, or interim releases) falls within the vulnerable range.Affected if Installed firmware version is less than 12.0.2.15
The device is affected if it is an M4300 series switch or M4200 and runs firmware version lower than 12.0.2.15.
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 data12.0.2.15
Apply NETGEAR firmware version 12.0.2.15 or later to all affected devices. If immediate patching is not possible, consider network segmentation to limit exposure to untrusted networks.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2017-18836 — 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-2017-18836 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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