CVE-2018-0641
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 Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary code via tools_system.cgi date parameter, time parameter, and offset 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 · moderate confidenceBuffer overflow vulnerability in Aterm HC100RC router firmware (version 1.0.1 and earlier) in the tools_system.cgi script. The date, time, and offset parameters do not properly validate input bounds, allowing an authenticated administrator to overflow buffers and execute arbitrary code.
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<= 1.0.1CVSS 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:3.0/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 checksWork through these to decide whether this CVE applies to you.
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Identify the device modelCheck the router label or web interface system information page to confirm the model is Aterm HC100RCAffected if The device is not an Aterm HC100RC router, then it is not affected by this specific vulnerability
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Check firmware versionAccess the router web administration interface and navigate to the system or firmware information page to view the installed firmware version, or check via CLI if availableAffected if The installed firmware version is 1.0.1 or earlier, indicating the device is within the affected version range
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Verify administrative access is enabledCheck if the router web management interface (tools_system.cgi) is reachable from the network by attempting to access the administrative portal or checking firewall rulesAffected if The administrative web interface is exposed and accessible to untrusted networks, making the vulnerability exploitable
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Confirm authenticated access statusDetermine whether default administrative credentials are in use or if there are any user accounts configured with administrative privilegesAffected if An authenticated administrator account exists and can access the tools_system.cgi script, which is required for exploitation of this buffer overflow
The environment is affected only if the device is an NEC Aterm HC100RC router running firmware version 1.0.1 or earlier with its administrative interface accessible to an authenticated administrator.
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 patch if available; if no patch exists, restrict administrative management interface access to trusted IP addresses via firewall rules or VPN, and consider replacing the affected device.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-0641 — 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-2018-0641 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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