CVE-2020-26926
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 CBR40 before 2.5.0.10, RBK752 before 3.2.15.25, RBR750 before 3.2.15.25, RBS750 before 3.2.15.25, RBK852 before 3.2.10.11, RBR850 before 3.2.10.11, and RBS850 before 3.2.10.11.
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 confidenceAuthentication bypass vulnerability in multiple NETGEAR Orbi mesh systems and CBR routers allows attackers to bypass authentication mechanisms. The critical CVSS 9.6 score indicates the vulnerability is easily exploitable and can lead to full device compromise.
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< 2.5.0.10< 3.2.15.25< 3.2.10.11< 3.2.15.25< 3.2.10.11< 3.2.15.25< 3.2.10.11CVSS 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
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/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 NETGEAR device modelLocate the device label on the router or satellite unit, or log into the web administration interface and check the device information page to confirm the exact model number (CBR40, RBK752, RBR750, RBS750, RBK852, RBR850, or RBS850)Affected if The device is one of the seven affected models listed in the CVE
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Access firmware version informationLog into the NETGEAR web interface (typically at 192.168.1.1 or routerlogin.net), navigate to Settings > Administration > Firmware Update or similar section, and record the current firmware version displayedAffected if Unable to retrieve firmware version from the device
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Compare firmware version against affected rangesCompare the installed firmware version to the vulnerable thresholds: CBR40 < 2.5.0.10, RBK752/RBR750/RBS750 < 3.2.15.25, RBK852/RBR850/RBS850 < 3.2.10.11Affected if The installed firmware version is lower than the fixed version for your specific model
Your environment is affected if you are running any of the seven listed NETGEAR models (CBR40, RBK752, RBR750, RBS750, RBK852, RBR850, RBS850) with firmware versions below the corresponding fixed thresholds.
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 · scoped2.5.0.103.2.10.113.2.15.25
Update affected NETGEAR devices (CBR40, RBK752, RBR750, RBS750, RBK852, RBR850, RBS850) to the specified fixed firmware versions. If updates are unavailable, isolate affected devices behind a firewall and disable remote management interfaces.
CBR40: firmware >= 2.5.0.10 | RBK752/RBR750/RBS750: firmware >= 3.2.15.25 | RBK852/RBR850/RBS850: firmware >= 3.2.10.11
- 1. Identify the exact NETGEAR Orbi router or mesh system model (CBR40, RBK752, RBK852, RBR750, RBR850, RBS750, or RBS850) from the device label or web interface
- 2. Access the router's web interface by navigating to routerlogin.net or using the router's IP address
- 3. Log in with admin credentials
- 4. Navigate to Settings > Administration > Router Update or similar firmware update section
- 5. Check for available firmware updates and install the version >= the fixed release for your model
- 6. Alternatively, download the firmware manually from the NETGEAR support site (kb.netgear.com) matching your exact model and version
- 7. In the router admin interface, go to Settings > Administration > Firmware Update > Manual Update
- 8. Upload the downloaded firmware file and wait for the update to complete
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-26926 — 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-2020-26926 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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