CVE-2020-26921
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 GS110EMX before 1.0.1.7, GS810EMX before 1.7.1.3, XS512EM before 1.0.1.3, and XS724EM before 1.0.1.3.
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 NETGEAR network switches (GS110EMX, GS810EMX, XS512EM, XS724EM) allows unauthorized attackers to bypass authentication mechanisms and gain administrative access to device management interfaces. The vulnerability affects specific firmware versions prior to the patched releases.
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< 1.0.1.7< 1.7.1.3< 1.0.1.3< 1.0.1.3CVSS 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 switch modelLog into the device web management interface or check the physical device label to confirm the exact model number (GS110EMX, GS810EMX, XS512EM, or XS724EM).Affected if The model is one of these four: GS110EMX, GS810EMX, XS512EM, or XS724EM.
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Check the installed firmware versionAccess the device management interface, navigate to the Firmware/Status section, or use the command line interface (if available) to retrieve the current firmware version string.Affected if The firmware version displayed is lower than 1.0.1.7 for GS110EMX, lower than 1.7.1.3 for GS810EMX, or lower than 1.0.1.3 for XS512EM/XS724EM.
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Confirm the management interface is accessibleVerify that the device web management interface (HTTP/HTTPS on ports 80/443 or the device IP) is reachable from network segments accessible to potential attackers.Affected if The management interface is exposed to untrusted networks or the internet without network segmentation or firewall controls.
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Verify authentication is requiredAttempt to access restricted device configuration pages or functions without valid credentials to confirm whether authentication is properly enforced.Affected if Authentication can be bypassed and administrative functions are accessible without valid credentials.
A defender is affected if they are running any of the four listed NETGEAR switch models with firmware versions below the thresholds AND the management interface is accessible to untrusted networks.
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 data1.0.1.31.0.1.71.7.1.3
Update firmware to version 1.0.1.7 (GS110EMX), 1.7.1.3 (GS810EMX), or 1.0.1.3 (XS512EM/XS724EM). If immediate patching is not possible, restrict management interface access to trusted networks via VLAN segmentation or firewall rules.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2020-26921 — 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-2020-26921 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
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