CVE-2020-6842
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 · uneditedD-Link DCH-M225 1.05b01 and earlier devices allow remote authenticated admins to execute arbitrary OS commands via shell metacharacters in the media renderer name.
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 confidenceD-Link DCH-M225 Wi-Fi range extender versions 1.05b01 and earlier contain an OS command injection vulnerability. An attacker with authenticated administrator access can inject arbitrary OS commands through shell metacharacters in the media renderer name parameter, achieving full command 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<= 1.05b01CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/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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Identify the device modelLocate the physical device or check the web administration interface for the model name (typically found on the status page or device info page). Look for 'DCH-M225' marking.Affected if The device is not a D-Link DCH-M225 unit - different models are not affected by this specific vulnerability.
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Check the firmware versionAccess the device's web administration interface and navigate to the status or system information page. Locate the firmware version field. It is typically displayed as something like '1.05b01' or similar.Affected if The firmware version is 1.05b01 or earlier (for example, 1.05b01, 1.04, 1.03, etc.). Versions higher than 1.05b01 are not affected.
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Verify administrative access is enabledConfirm the device's web management interface is accessible. Attempt to reach the device's HTTP administration page on its LAN IP address (typically 192.168.0.50 or similar default).Affected if The web administration interface is accessible and responds to authentication requests - this is required for the authenticated command injection to be exploitable.
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Check network exposure of the management interfaceDetermine if the device's web interface is reachable from networks other than your trusted local network. Check router firewall rules, port forwarding configurations, or VPN status.Affected if The administrative interface is exposed to untrusted networks (such as directly to the internet or guest network segments). The vulnerability requires an authenticated attacker, so exposure increases risk.
You are affected if you have a D-Link DCH-M225 device running firmware version 1.05b01 or earlier with its web administration interface accessible to an attacker who could obtain credentials.
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 dataThis is an end-of-life device with no available patch. Implement network segmentation to isolate the device, restrict administrative interface access to trusted networks only, and replace with a supported device.
- 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-2020-6842 — 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-2020-6842 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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