CVE-2017-2142
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 · uneditedBuffer overflow in WN-G300R3 firmware Ver.1.03 and earlier allows remote attackers to execute arbitrary OS commands via unspecified vectors.
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 confidenceBuffer overflow in WN-G300R3 wireless router firmware (Ver.1.03 and earlier) allows remote unauthenticated attackers to execute arbitrary OS commands via network-based exploitation.
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<= 1.03CVSS 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:3.0/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 the router modelAccess the router admin interface or physically inspect the device label to confirm the exact model is Iodata WN-G300R3Affected if The device is an Iodata WN-G300R3 router
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Determine the installed firmware versionLog into the router admin panel (typically via web browser at 192.168.0.1 or similar) and locate the firmware version in the system status or firmware upgrade sectionAffected if The firmware version is 1.03 or earlier
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Verify network exposureCheck if the router management interface is accessible from the WAN/internet side (external IP exposure or port forwarding rules)Affected if The router admin interface is reachable from untrusted networks
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Confirm remote access settingsExamine the router admin settings for any remote management or WAN access features that are enabledAffected if Remote administration is enabled and accessible over the network
You are affected if you have an Iodata WN-G300R3 router running firmware version 1.03 or earlier that is network-accessible to untrusted parties.
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.
dbcve · scopedApply vendor firmware update if available; if device is end-of-life, replace with a supported router or implement network isolation/firewalling to limit exposure to untrusted networks.
Firmware version > 1.03 (check IOData website for latest available version)
- 1. Visit the official IOData support website (www.iodata.jp) and navigate to the WN-G300R3 product support page
- 2. Locate the firmware download section
- 3. Check if a firmware version newer than 1.03 is available for download
- 4. If a newer version exists, download the firmware file
- 5. Access the router's web administration interface
- 6. Navigate to the firmware upgrade section (usually under Administration or System settings)
- 7. Upload the downloaded firmware file and initiate the upgrade
- 8. Wait for the upgrade to complete and verify the router restarts successfully
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,488.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-2142 — 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-2017-2142 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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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