CVE-2019-20640
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 D3600 before 1.0.0.76, D6000 before 1.0.0.76, D6200 before 1.1.00.32, D7000 before 1.0.1.68, JR6150 before 1.0.1.18, PR2000 before 1.0.0.28, R6020 before 1.0.0.38, R6050 before 1.0.1.18, R6080 before 1.0.0.38, R6120 before 1.0.0.46, R6220 before 1.1.0.80, R6260 before 1.1.0.40, R6700v2 before 1.2.0.36, R6800 before 1.2.0.36, R6900v2 before 1.2.0.36, WNR2020 before 1.1.0.62, and XR500 before 2.3.2.32.
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 confidenceMultiple NETGEAR router models suffer from a stack-based buffer overflow vulnerability that can be exploited by an unauthenticated attacker, potentially allowing remote code execution or denial of service. The vulnerability affects the web management interface and requires no authentication to trigger.
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< 1.0.0.76< 1.0.0.76< 1.1.00.32< 1.0.1.68< 1.0.1.18< 1.0.0.28< 1.0.0.38< 1.0.1.18CVSS 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 router device label or log into the web management interface and check the status page for the exact model designation (such as D3600, D6000, D7000, R6050, etc.)Affected if The model matches one of the affected models: D3600, D6000, D6200, D7000, Jr6150, Pr2000, R6020, or R6050
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Check the installed firmware versionLog into the router web interface (typically at 192.168.1.1) and navigate to Administration > Firmware Update or Router Status to view the current firmware version numberAffected if The firmware version is lower than the specified threshold for your model (D3600/D6000 < 1.0.0.76, D6200 < 1.1.00.32, D7000 < 1.0.1.68, Jr6150 < 1.0.1.18, Pr2000 < 1.0.0.28, R6020 < 1.0.0.38, R6050 < 1.0.1.18)
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Confirm web management interface is enabledVerify the router web management interface is accessible on the LAN or WAN interface (default ports 80/443) - check router settings under Administration > Remote Management or similarAffected if The web management interface is exposed and accessible (the vulnerability is triggered through this interface without authentication)
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Verify device is reachable on the networkAttempt to ping the router IP address or curl/http request to the web interface to confirm the device is online and respondingAffected if The router is powered on and connected to the network, making the vulnerable web interface reachable
If your router model is in the affected list AND your current firmware version is below the specified threshold for that model, your device is vulnerable to this buffer overflow vulnerability that can be exploited without authentication through the web management interface.
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 data1.0.0.281.0.0.381.0.0.76
Update affected devices to the specified firmware versions (e.g., D3600/D6000 to 1.0.0.76, D7000 to 1.0.1.68, R6220 to 1.1.0.80). If patching is not immediately possible, restrict access to the router management interface from untrusted networks.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-20640 — 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-2019-20640 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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