CVE-2020-15489
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 · uneditedAn issue was discovered on Wavlink WL-WN530HG4 M30HG4.V5030.191116 devices. Multiple shell metacharacter injection vulnerabilities exist in CGI scripts, leading to remote code execution with root privileges.
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 confidenceMultiple CGI scripts on the Wavlink WL-WN530HG4 devices (firmware M30HG4.V5030.191116) suffer from shell metacharacter injection vulnerabilities, allowing unauthenticated remote attackers to inject OS commands through insufficient input sanitization. The injected commands execute with root privileges, enabling full device compromise.
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= m30hg4.v5030.191116CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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.
-
Identify the device modelAccess the device's web interface and check the status or system info page for the model number, or examine HTTP responses/headers for 'WL-WN530HG4' or 'Wavlink' identifiersAffected if The device model is Wavlink WL-WN530HG4
-
Check the firmware versionLocate the firmware version in the web interface (usually under System > Status, Administration > Firmware Upgrade, or a similar system information page). The exact version string is M30HG4.V5030.191116Affected if The firmware version is M30HG4.V5030.191116 exactly as listed in the affected versions
-
Verify CGI script accessibilityAttempt to access common CGI endpoints on the device's web server (such as /cgi-bin/ or test pages). The vulnerability exists in multiple CGI scripts that lack input sanitizationAffected if CGI scripts are reachable and no authentication is required to access them (unauthenticated access confirms the attack surface)
-
Confirm web interface exposureCheck if the device's HTTP/HTTPS web interface is exposed to unauthenticated network access, either on LAN or WANAffected if The web management interface is accessible without authentication from the network segment being tested
A user is affected if the device is a Wavlink WL-WN530HG4 running firmware version M30HG4.V5030.191116 and its CGI scripts are accessible without authentication.
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 dataSince no vendor patch is available for this end-of-life device, mitigate by isolating affected devices on a restricted network segment, disabling WAN access to the web interface, or replacing with a supported device receiving security updates.
- Consultation8.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $10,240.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-15489 — 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-2020-15489 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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
- No spam, self-promotion, credentials, or personal data