CVE-2020-1837
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 · uneditedChangXiang 8 Plus with versions earlier than 9.1.0.136(C00E121R1P6T8) have a denial of service vulnerability. The device does not properly handle certain message from base station, the attacker could craft a fake base station to launch the attack. Successful exploit could cause a denial of signal service condition.
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 confidenceChangXiang 8 Plus devices earlier than version 9.1.0.136(C00E121R1P6T8) contain a denial of service vulnerability in base station message handling. An attacker can deploy a rogue base station to send specially crafted messages that cause the device to crash or lose signal service.
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< 9.1.0.136\(c00e121r1p6t8\)CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:A/AC:H/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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Confirm device model is ChangXiang 8 PlusAccess the device management interface or CLI and verify the exact model designation matches 'ChangXiang 8 Plus' or similar variant namingAffected if The device model is Huawei ChangXiang 8 Plus or variant
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Locate firmware version informationCheck the device's system information page, web management interface, or CLI command such as 'display version' to find the installed firmware version stringAffected if Unable to retrieve firmware version information from the device
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Compare installed version against thresholdExtract the full firmware version string (for example: 9.1.0.XXX) and compare numerically to 9.1.0.136(C00E121R1P6T8). Any version earlier than 9.1.0.136 is affectedAffected if The installed firmware version is less than 9.1.0.136 (for example: 9.1.0.135, 9.0.x.x, or earlier)
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Identify base station functionality exposureDetermine if the device is actively processing base station messages. This is typically a core function of the ChangXiang 8 Plus as a base station device, so check if the device has active radio/transmission capabilities enabledAffected if The device has base station messaging functionality enabled and is processing external base station communications
A user is affected if the device is a ChangXiang 8 Plus running firmware earlier than version 9.1.0.136(C00E121R1P6T8) with base station messaging functionality active.
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 data9.1.0.136
Upgrade ChangXiang 8 Plus to version 9.1.0.136(C00E121R1P6T8) or later to obtain the patched firmware that properly validates base station messages.
- Consultation2.0 h
- Implementation1.0 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-2020-1837 — 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-2020-1837 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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