CVE-2018-21226
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 authentication bypass. This affects JNR1010v2 before 1.1.0.48, JWNR2010v5 before 1.1.0.48, WNR1000v4 before 1.1.0.48, WNR2020 before 1.1.0.48, and WNR2050 before 1.1.0.48.
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 confidenceAuthentication bypass vulnerability in multiple NETGEAR wireless router models (JNR1010v2, JWNR2010v5, WNR1000v4, WNR2020, WNR2050) allows unauthorized attackers to bypass authentication mechanisms and gain administrative access to the device. The vulnerability exists in firmware versions prior to 1.1.0.48.
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< 1.1.0.48< 1.1.0.48< 1.1.0.48< 1.1.0.48< 1.1.0.48CVSS 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 (usually on the bottom or back of the device). Alternatively, log into the router admin interface and check the status or device info page for the exact model number.Affected if The model is one of: JNR1010v2, JWNR2010v5, WNR1000v4, WNR2020, or WNR2050.
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Check the installed firmware versionLog into the router web admin interface (typically at 192.168.1.1 or 192.168.0.1). Navigate to the Firmware Upgrade, Router Status, or Administration section to view the current firmware version.Affected if The displayed firmware version is lower than 1.1.0.48.
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Verify remote management accessIn the router admin interface, check the Remote Management, Remote Access, or Web Service settings to see if remote administration from outside the local network is enabled.Affected if Remote management is enabled and the router is accessible from the internet, increasing exposure to unauthenticated attackers.
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Confirm network accessibilityAttempt to access the router admin interface from an external network (such as using a mobile hotspot) or check router logs for external connection attempts.Affected if The router admin interface is reachable from the internet, which would allow remote exploitation of the authentication bypass.
A user is affected if they own one of the listed NETGEAR models (JNR1010v2, JWNR2010v5, WNR1000v4, WNR2020, WNR2050) and the installed firmware version is below 1.1.0.48, especially if remote management 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.
From vendor data1.1.0.48
Update affected NETGEAR router firmware to version 1.1.0.48 or later. If firmware updates are unavailable, consider network isolation or device replacement.
- Consultation2.0 h
- Implementation2.0 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-2018-21226 — 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-2018-21226 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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