CVE-2011-5010
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 · uneditedapps/a3/cfg_ethping.cgi in the Ctek SkyRouter 4200 and 4300 allows remote attackers to execute arbitrary commands via shell metacharacters in the PINGADDRESS parameter for a "u" action.
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 confidenceThis is a command injection vulnerability in the Ctek SkyRouter 4200 and 4300's web interface CGI script (cfg_ethping.cgi). Attackers can execute arbitrary OS commands by injecting shell metacharacters into the PINGADDRESS parameter when using the 'u' action. The vulnerability is remotely exploitable without authentication, making it critical.
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= 4200= 4300CVSS 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
- Authentication
- None
- Confidentiality
- Complete
- Integrity
- Complete
- Availability
- Complete
AV:N/AC:L/Au:N/C:C/I:C/A:C
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 modelAccess the device's web interface or check the device label/documentation to confirm it is a Ctek SkyRouter 4200 or 4300. Look for model number in the web UI header or status page.Affected if The device is a Ctek SkyRouter 4200 or 4300
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Verify the web interface is enabledAttempt to access the device's web interface on the default HTTP port (typically 80). If login page or device status page loads, the web interface is active.Affected if The web interface is accessible on the network
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Confirm the vulnerable CGI script existsAttempt to access the URI '/cfg_ethping.cgi' on the device. A 404 response indicates the script is not present, while other responses suggest it exists.Affected if The cfg_ethping.cgi script is present on the device
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Check if the ping functionality is exposedSubmit a GET or POST request to cfg_ethping.cgi with the 'u' action parameter (e.g., ?action=u). A response related to ping configuration or execution indicates the vulnerable code path exists.Affected if The 'u' action responds on cfg_ethping.cgi, indicating ping functionality is enabled
If the device is a Ctek SkyRouter 4200 or 4300 with an accessible web interface and the cfg_ethping.cgi script responds to the 'u' action, the device is likely vulnerable to CVE-2011-5010.
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 dataIf vendor firmware updates are unavailable, restrict network access to the device's web management interface using ACLs or place the device behind a firewall. Consider replacing the end-of-life device if patches are not available.
- Consultation4.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2011-5010 — 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-2011-5010 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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