CVE-2018-18009
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 · unediteddirary0.js on D-Link DIR-140L, DIR-640L devices allows remote unauthenticated attackers to discover admin credentials.
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 confidenceThe dirary0.js component in D-Link DIR-140L and DIR-640L routers contains an information disclosure vulnerability allowing remote unauthenticated attackers to retrieve admin credentials, likely through improper handling of authentication-related API calls or logging.
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= 1.02= 1.01ruCVSS 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.
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Identify router modelAccess the router web interface or check the device label/metadata to confirm the model is D-Link DIR-140L or DIR-640LAffected if Model is DIR-140L or DIR-640L
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Check firmware versionLog into router admin panel and navigate to System > Firmware or Status page to view the installed firmware versionAffected if Firmware version is 1.02 (DIR-140L) or 1.01ru (DIR-640L)
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Verify vulnerable component existsAttempt to access the URI /dirary0.js on the router's web server (e.g., http://<router-ip>/dirary0.js)Affected if The dirary0.js file is accessible and responds to requests
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Test for unauthenticated credential disclosureSend a direct HTTP request to the router's authentication-related API endpoints that dirary0.js interfaces with, without providing any credentials, and observe if admin username/password are returned in the responseAffected if Admin credentials are returned in plain text or encoded form without authentication
The environment is affected if the router is a DIR-140L or DIR-640L running firmware 1.02 or 1.01ru respectively, and the dirary0.js component responds to unauthenticated requests revealing admin 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 dataIf available, apply D-Link firmware updates; otherwise, disable remote web management, restrict administrative access to trusted IPs only, or replace affected devices.
- Consultation2.0 h
- Implementation3.0 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-2018-18009 — 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-2018-18009 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
- No spam, self-promotion, credentials, or personal data