CVE-2017-18716
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 a stack-based buffer overflow by an unauthenticated attacker. This affects D6200 before 1.1.00.24, R6700v2 before 1.1.0.42, R6800 before 1.1.0.42, and R6900v2 before 1.1.0.42.
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 confidenceA stack-based buffer overflow vulnerability in NETGEAR router models D6200, R6700v2, R6800, and R6900v2 allows unauthenticated remote attackers to execute arbitrary code or cause denial of service via crafted network requests due to insufficient bounds checking in the firmware.
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< 1.1.00.24< 1.1.0.42< 1.1.0.42< 1.1.0.42CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/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 router modelLocate the model number on the device label or log into the router admin interface (usually at 192.168.1.1) and check the status or device info pageAffected if Model is D6200, R6700v2, R6800, or R6900v2
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Check the installed firmware versionIn the router admin interface, navigate to Advanced > Administration > Firmware Update or check the status/dashboard page for the current firmware version. The version is also sometimes visible via telnet using the 'ver' commandAffected if Firmware version cannot be determined or is visible
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Compare firmware version to affected rangesCompare the installed version against these thresholds: D6200 < 1.1.00.24, R6700v2/R6800/R6900v2 < 1.1.0.42. Note that some R6700v2 units may show R6700 in the model nameAffected if Installed version is below 1.1.00.24 (D6200) or below 1.1.0.42 (R6700v2, R6800, R6900v2)
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Assess network exposure of the router management interfaceDetermine if the router web interface (HTTP/HTTPS on ports 80/443 or custom ports) is accessible from untrusted networks. Check firewall rules, NAT settings, or if the router is directly exposed to the internetAffected if The router management interface is reachable from external networks without VPN or firewall restrictions
The device is affected if it is a D6200, R6700v2, R6800, or R6900v2 model running firmware version below 1.1.00.24 (D6200) or below 1.1.0.42 (others), and the device is network-accessible to potential attackers.
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 data1.1.00.241.1.0.42
Update affected devices to firmware version 1.1.00.24 (D6200) or 1.1.0.42 and later (R6700v2, R6800, R6900v2). If patching is not feasible, implement network segmentation to restrict access to these devices.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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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-2017-18716 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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