CVE-2018-7937
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 · uneditedIn Huawei HiRouter-CD20-10 with the versions before 1.9.6 and WS5200-10 with the versions before 1.9.6, there is a plug-in signature bypass vulnerability due to insufficient plug-in verification. An attacker may tamper with a legitimate plug-in to build a malicious plug-in and trick users into installing it. Successful exploit could allow the attacker to obtain the root permission of the device and take full control over the device.
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 confidenceThe HiRouter-CD20-10 and WS5200-10 routers have a plug-in signature bypass vulnerability. The devices perform insufficient verification of plug-in signatures before installation, allowing attackers to modify legitimate plugins or create malicious plugins that appear valid. When users install these tampered plugins, the attacker gains root access and full device control.
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< hirouter-cd20-10_1.9.6< ws5200-10_1.9.6CVSS 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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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Check the router firmware versionLog into the router web administration interface and navigate to the System or Device Information section to view the current firmware version. Alternatively, access via CLI (telnet/ssh) and run the command to display firmware version information.Affected if The displayed firmware version is earlier than 1.9.6 (for example, 1.9.5 or earlier)
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Confirm the exact router model numberLocate the model number on the physical device label or check the status page in the router web interface. The affected models are HiRouter-CD20-10 and WS5200-10.Affected if The device is a HiRouter-CD20-10 or WS5200-10 model with firmware below version 1.9.6
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Inspect the installed plugin listIn the router web interface, go to the Plugin Management or Application section. Review all installed plugins and note their sources (official or third-party).Affected if Any plugins are present, especially those from untrusted or unofficial sources, because the signature verification flaw allows tampered plugins to be accepted as valid
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Check for unauthorized root access indicatorsUse the CLI to examine user accounts (/etc/passwd), running processes (ps), and network connections (netstat) for signs of compromise. Look for unexpected admin accounts or unfamiliar processes.Affected if Unknown user accounts, suspicious processes, or other evidence of unauthorized root access is found on the device
A user is affected if they own a HiRouter-CD20-10 or WS5200-10 router running firmware versions below 1.9.6, particularly if they have installed plugins from any source.
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 dataUpdate the affected Huawei router firmware to version 1.9.6 or later. Avoid installing plugins from untrusted or unofficial sources until the firmware update is applied.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-7937 — 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-2018-7937 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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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