dbcve.org
Command InjectionWeakness · CWE-77

CVE-2026-6483

HIGH · 7.2 CVSS v3.1 Published 2026-04-17
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
78/100
Remediation priority · High
Remotely reachable Zero-click

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 · unedited
A vulnerability was found in Wavlink WL-WN530H4 20220721. This vulnerability affects the function strcat/snprintf of the file /cgi-bin/internet.cgi. The manipulation results in os command injection. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 2026.04.16 is able to resolve this issue. Upgrading the affected component is recommended.

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 confidence

OS command injection vulnerability in Wavlink WL-WN530H4 router's /cgi-bin/internet.cgi where the strcat/snprintf functions improperly handle user input, allowing remote attackers to execute arbitrary OS commands on the device.

MitigationUpgrade firmware to version 2026.04.16. If patching is not immediately feasible, restrict remote access to the device's web interface or disable the internet.cgi endpoint until the update can be applied.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

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
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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the device model
    Access the router's web interface or check the device label/marketing materials to confirm it is a Wavlink WL-WN530H4 model
    Affected if The device is not a WL-WN530H4 model, then this specific CVE does not apply
  2. Check the installed firmware version
    Log into the router's web interface and navigate to the Status or System section to view the firmware version, or use the command 'cat /proc/version' or 'nvram get firmware_version' via telnet/SSH if enabled
    Affected if The firmware version is earlier than 2026.04.16 (the fixed version) or cannot be determined, the device may be vulnerable
  3. Verify the CGI endpoint is accessible
    Attempt to access the URL 'http://[router-ip]/cgi-bin/internet.cgi' from a network that can reach the router
    Affected if The endpoint returns any response (even an error) rather than a 404, the vulnerable code path exists on the device
  4. Check if remote web management is enabled
    In the router's web interface, go to Administration or Security settings and look for 'Remote Management', 'Remote Web Access', or 'HTTP/HTTPS Remote Access' settings
    Affected if Remote management is enabled and the CGI endpoint is reachable from untrusted networks, the device is at higher risk of remote exploitation

If the device is a Wavlink WL-WN530H4 with firmware earlier than 2026.04.16 and the /cgi-bin/internet.cgi endpoint is accessible (especially from remote networks), the environment is affected by this CVE.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade firmware to version 2026.04.16. If patching is not immediately feasible, restrict remote access to the device's web interface or disable the internet.cgi endpoint until the update can be applied.

Recommended fix High confidence

2026.04.16

  1. 1. Download firmware version 2026.04.16 from the official Wavlink support site (dl.wavlink.com) for the WL-WN530H4 model
  2. 2. Access the router's web administration interface by entering the device IP address in a browser
  3. 3. Navigate to the Administration or System settings section
  4. 4. Locate the Firmware Upgrade option
  5. 5. Upload the downloaded firmware file (2026.04.16)
  6. 6. Wait for the upgrade process to complete—do not power off or disconnect the device during this process
  7. 7. After reboot, verify the firmware version has been updated to 2026.04.16 in the system information page
Caveat Firmware upgrades may reset configuration to defaults; back up current settings before upgrading if custom configurations are in place

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-6483 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
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  • Version or environment caveats, and links to real fixes
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