CVE-2020-9122
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 · uneditedSome Huawei products have an insufficient input verification vulnerability. Attackers can exploit this vulnerability in the LAN to cause service abnormal on affected devices.Affected product versions include:HiRouter-CD30-10 version 10.0.2.5;HiRouter-CT31-10 version 10.0.2.20;WS5200-12 version 10.0.1.9;WS5281-10 version 10.0.5.10;WS5800-10 version 10.0.3.25;WS7100-10 version 10.0.5.21;WS7200-10 version 10.0.5.21.
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 confidenceInsufficient input verification vulnerability in Huawei router firmware allowing authenticated attackers on the LAN to trigger service abnormalities through malformed input. The vulnerability affects multiple HiRouter and WS series devices.
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>= 10.0.2.5, < 10.0.5.7>= 10.0.2.20, < 10.0.2.37>= 10.0.1.9, <= 10.0.5.6>= 10.0.5.10, < 10.0.5.32>= 10.0.3.25, < 10.0.3.33>= 10.0.5.21, < 10.0.5.37>= 10.0.5.21, < 10.0.5.37CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 modelCheck the device label, web admin interface, or SSH into the device to determine the exact model (HiRouter CD30, HiRouter CT31, WS5200, WS5281, WS5800, WS7100, or WS7200)Affected if Device is one of the seven affected models listed in the CVE
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Locate the firmware versionAccess the device web admin panel (typically at 192.168.1.1) and navigate to System Settings > Firmware Version, or check via SSH using 'version' or 'cat /proc/version' commandsAffected if Unable to retrieve firmware version information
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Compare firmware version against affected rangesMatch your installed firmware version to these ranges: CD30 >= 10.0.2.5 and < 10.0.5.7; CT31 >= 10.0.2.20 and < 10.0.2.37; WS5200 >= 10.0.1.9 and <= 10.0.5.6; WS5281 >= 10.0.5.10 and < 10.0.5.32; WS5800 >= 10.0.3.25 and < 10.0.3.33; WS7100 >= 10.0.5.21 and < 10.0.5.37; WS7200 >= 10.0.5.21 and < 10.0.5.37Affected if Your installed version falls within any of the specified version ranges for your model
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Verify LAN admin access is enabledCheck the device web interface under LAN settings or Administration to confirm whether remote/LAN management is enabled, which would allow authenticated users on the local network to access admin functionsAffected if LAN management interface is exposed and accessible to untrusted users on the local network
Your device is affected if it is one of the seven listed models AND its firmware version falls within the specified version ranges AND the LAN admin interface is accessible to authenticated attackers.
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 data10.0.2.3710.0.3.3310.0.5.7
Apply vendor firmware updates when released by Huawei. Until patches are available, minimize attack surface by restricting LAN access to trusted users only and monitoring for anomalous activity.
- 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-2020-9122 — 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-2020-9122 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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