CVE-2021-20169
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 · uneditedNetgear RAX43 version 1.0.3.96 does not utilize secure communications to the web interface. By default, all communication to/from the device is sent via HTTP, which causes potentially sensitive information (such as usernames and passwords) to be transmitted in cleartext.
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 Netgear RAX43 router firmware version 1.0.3.96 provides its web management interface exclusively over unencrypted HTTP rather than HTTPS. All authentication credentials and session data are transmitted in plaintext across the network, enabling eavesdropping attackers on the same network segment or man-in-the-middle attackers to capture sensitive administrative credentials.
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= 1.0.3.96CVSS 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
- Physical
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:P/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 modelAccess the router web interface or check the device label to confirm the model is Netgear RAX43Affected if The device is not a Netgear RAX43, then this CVE does not apply
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Check the firmware versionLog into the router web interface and navigate to Administration > Firmware Update or check the status page to view the installed firmware versionAffected if The firmware version is NOT exactly 1.0.3.96, then this specific CVE does not apply
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Verify HTTP is used for the management interfaceAttempt to access the router web interface using http:// (not https://) - try accessing the router IP address with HTTP protocolAffected if The management interface is accessible over HTTP and responds, the plaintext transmission vulnerability is present
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Confirm HTTPS is not availableAttempt to access the router web interface using https:// and observe whether a secure connection is accepted or if the browser returns an errorAffected if HTTPS is not available or not accepted for the management interface, the plaintext vulnerability is confirmed
If the device is a Netgear RAX43 running firmware version 1.0.3.96 and the management interface is accessible only over HTTP (not HTTPS), the environment is affected by this CVE.
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 dataEnable HTTPS on the device if the firmware update provides this option; otherwise, restrict administrative access to trusted networks only, implement network segmentation (VLANs) to isolate the router, and consider requiring VPN access for any administrative interactions with the device.
- Consultation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-20169 — 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-2021-20169 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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