CVE-2020-26903
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 disclosure of administrative credentials. 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 · high confidenceNETGEAR Orbi (RBK752, RBR750, RBS750, RBK852, RBR850, RBS850) and CBR40 router/firmware versions prior to the specified patches contain a vulnerability allowing disclosure of administrative credentials, likely through improper access control or hardcoded credentials exposed in firmware or management interfaces.
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< 3.2.15.25< 3.2.15.25< 3.2.10.11< 3.2.10.11< 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
- 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 NETGEAR device modelLocate the model number on the device label or check the admin interface System or Administration settings page for the exact model designationAffected if The device is a CBR40, RBK752, RBR750, RBS750, RBK852, RBR850, or RBS850 model
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Determine the current firmware versionLog into the NETGEAR web administration interface and navigate to the Administration > Firmware Update or Advanced > Administration > Router/Orbi Status page to view the installed firmware versionAffected if The displayed firmware version is below the safe threshold for your model
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Compare version against affected rangesFor CBR40: check if version is below 2.5.0.10. For RBK752/RBR750/RBS750: check if below 3.2.15.25. For RBK852/RBR850/RBS850: check if below 3.2.10.11Affected if The installed firmware version falls below the version number specified for your device model
If the device is an affected NETGEAR model (CBR40, RBK752, RBR750, RBS750, RBK852, RBR850, or RBS850) and runs firmware below the specified version thresholds, the credential disclosure vulnerability is present.
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 data2.5.0.103.2.10.113.2.15.25
Update NETGEAR device firmware to version 2.5.0.10 or higher for CBR40, 3.2.15.25 or higher for RBK752/RBR750/RBS750, and 3.2.10.11 or higher for RBK852/RBR850/RBS850.
- 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-2020-26903 — 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-2020-26903 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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