CVE-2018-6021
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 · uneditedSilex SD-320AN version 2.01 and prior and GE MobileLink(GEH-SD-320AN) version GEH-1.1 and prior have a system call parameter that is not properly sanitized, which may allow remote code execution.
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 confidenceCommand injection vulnerability in Silex SD-320AN and GE MobileLink wireless gateway devices. The web interface contains a system call parameter that is not properly sanitized, allowing an attacker to inject arbitrary shell commands through the parameter, potentially achieving remote code execution on the device.
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<= 2.01<= geh-1.1CVSS 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
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
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 device modelAccess the device web interface or check device labeling/packaging to confirm the model is Silex SD-320AN or GE MobileLink (GEH SD-320AN)Affected if Device is not one of these specific models, the CVE does not apply
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Check firmware versionLog into the device web interface and navigate to the firmware/version information page, or check via administrative console if available. Compare the version number to the affected ranges: <= 2.01 for standard SD-320AN, or <= geh-1.1 for GEH variantsAffected if Firmware version is 2.01 or lower for SD-320AN, or geh-1.1 or lower for GEH variants, the device is vulnerable
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Verify web interface accessibilityAttempt to access the device HTTP/HTTPS management interface from the network. Check if TCP ports 80 or 443 (or custom web ports) are listening and reachableAffected if The web management interface is exposed to untrusted networks, the command injection flaw could be exploited
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Check network exposureReview network configuration and firewall rules to determine if the device management interface is accessible from outside the local trusted network or directly from the internetAffected if The device web interface is reachable from untrusted network segments or the internet, exploitation is possible
Your environment is affected if you have a Silex SD-320AN or GE MobileLink device running firmware version 2.01 or lower (or geh-1.1 or lower for GEH variants) with the web management interface accessible from your network.
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 dataRestrict network access to the device management interface; if available, apply vendor firmware updates; otherwise implement network segmentation to limit exposure to trusted users only.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-6021 — 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-2018-6021 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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