CVE-2019-20500
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 DWL-2600AP 4.2.0.15 Rev A devices have an authenticated OS command injection vulnerability via the Save Configuration functionality in the Web interface, using shell metacharacters in the admin.cgi?action=config_save configBackup or downloadServerip parameter.
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 confidenceD-Link DWL-2600AP 4.2.0.15 Rev A wireless access points contain an authenticated OS command injection vulnerability. An attacker with valid admin credentials can inject arbitrary shell commands through the configBackup or downloadServerip parameters in the admin.cgi?action=config_save endpoint by embedding shell metacharacters in the input fields during Save Configuration operations.
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<= 4.2.0.15CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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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Confirm device model is DWL-2600APCheck the device label, web management interface banner, or use network discovery tools (e.g., nmap, SNMP) to identify the exact hardware modelAffected if Device is not a D-Link DWL-2600AP
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Check firmware versionLog into the web management interface and navigate to the Status or System Information page to view the firmware version, or use SNMP to query sysDescr. Compare the installed version against the affected range (all versions <= 4.2.0.15)Affected if Firmware version is 4.2.0.15 or lower
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Verify web management interface is accessibleAttempt to access the device web interface on the configured management IP (typically HTTP/HTTPS on port 80/443). Check if the admin.cgi endpoint respondsAffected if Web interface is reachable from untrusted networks
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Check for default or weak admin credentialsReview saved credentials, check for default admin credentials (often admin/admin or admin/password), or attempt authentication to the web interface with common default credentialsAffected if Valid admin credentials exist (whether default or changed)
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Inspect the config_save endpointUsing valid admin credentials, examine if the admin.cgi?action=config_save endpoint accepts the configBackup or downloadServerip parameters. This is the vulnerable entry pointAffected if The config_save functionality with these parameters is accessible and accepts user-supplied input
The device is affected if it is a DWL-2600AP running firmware version 4.2.0.15 or lower, has its web interface accessible, and the config_save endpoint with configBackup/downloadServerip parameters accepts input.
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 dataApply vendor firmware updates if available; otherwise isolate affected devices on restricted network segments, limit web management interface access to trusted IP addresses only, and consider replacing end-of-life devices.
- Consultation4.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2019-20500 — 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-2019-20500 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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