CVE-2021-45524
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 R8000 devices before 1.0.4.62 are affected by a buffer overflow by an authenticated user.
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 confidenceNETGEAR R8000 routers before firmware version 1.0.4.62 contain a buffer overflow vulnerability that can be exploited by an authenticated user, potentially allowing remote code execution or service disruption.
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< 1.0.4.62CVSS 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
- Privileges
- High
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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 device modelLog into the router admin interface and check the device model under Administration > Router Info or similar. Alternatively, check the device label on the router hardware itself.Affected if The device is not a NETGEAR R8000 router, then this CVE does not apply.
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Check the firmware versionIn the router admin interface, navigate to Administration > Firmware Update or Router Info to view the current firmware version. The version is typically displayed as a number like 1.0.4.x.Affected if The installed firmware version is less than 1.0.4.62.
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Determine if remote administration is enabledIn the router admin interface, check Advanced > Remote Management. Verify whether remote web access is enabled and which IP addresses are permitted access.Affected if Remote administration is exposed to untrusted networks and the firmware version is below 1.0.4.62.
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Verify administrative access methodCheck if the router admin interface is accessible over HTTP/HTTPS from the WAN side. This can be tested by accessing the router's public IP address from an external network, if remote management is enabled.Affected if The administrative interface is accessible from the WAN and the firmware version is below 1.0.4.62, increasing exploitability.
The environment is affected if the device is a NETGEAR R8000 router running firmware version lower than 1.0.4.62, particularly if remote administrative access is enabled.
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.
dbcve · scoped1.0.4.62
Upgrade NETGEAR R8000 firmware to version 1.0.4.62 or later. Restrict administrative access to trusted personnel until the patch is applied.
1.0.4.62 or later
- Download firmware version 1.0.4.62 or later for NETGEAR R8000 from the official NETGEAR support website (kb.netgear.com)
- Access the NETGEAR R8000 router's web management interface by navigating to the router's IP address
- Log in with administrator credentials
- Navigate to the Advanced tab and select Administration > Firmware Update
- Click Check for New Version or manually upload the downloaded firmware file
- Wait for the firmware to upload and install - do not power off the router during this process
- The router will automatically restart after the update completes
- Verify the firmware version shows 1.0.4.62 or later in the router administration interface
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-45524 — 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-2021-45524 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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