CVE-2018-18894
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 · uneditedCertain older Lexmark devices (C, M, X, and 6500e before 2018-12-18) contain a directory traversal vulnerability in the embedded web server.
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 confidenceDirectory traversal vulnerability in the embedded web server of older Lexmark devices (C, M, X, and 6500e series) allows remote attackers to access arbitrary files on the filesystem via specially crafted HTTP requests, potentially exposing sensitive system files and configuration data.
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< lhs60.jr.p683< lhs60.cm4.p683< lhs60.hc.p683< lhs60.hv.p683< lhs60.tp.p683< lw71.vy2.p216< lw71.vy4.p216<= lhs60.cm4.p683CVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 Lexmark device modelCheck the device label or access the embedded web server landing page to confirm the exact model number (C748, C79x, C925, C95x, Cs41x, Cs51x, Cs748, or 6500e series).Affected if The device model matches one of the affected product families listed in the CVE.
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Check the installed firmware versionAccess the embedded web server (usually via http://<device-ip>) and navigate to the firmware or version information page, or print a configuration page from the device control panel to view the firmware version string.Affected if The firmware version is earlier than the specific threshold for your model: 6500e < lhs60.jr.p683, C748 < lhs60.cm4.p683, C79x < lhs60.hc.p683, C925 < lhs60.hv.p683, C95x < lhs60.tp.p683, Cs41x < lw71.vy2.p216, Cs51x < lw71.vy4.p683, Cs748 <= lhs60.cm4.p683.
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Verify the embedded web server is enabledAttempt to access the device web interface via HTTP or HTTPS on the standard ports (typically 80 or 443). If the login page loads, the web server is active.Affected if The embedded web server is accessible and responding to HTTP requests, which is required for the directory traversal exploit to be reachable.
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Assess network exposure of the web interfaceCheck the device network configuration to determine if the web server is bound to external/network interfaces or only to localhost/internal interfaces. This can be verified via the device network settings page or by attempting access from an external host.Affected if The web interface is exposed to untrusted networks, allowing remote attackers to send the specially crafted HTTP requests described in the CVE.
You are affected if your Lexmark device model is in the affected list, the firmware version is below the specified threshold, and the embedded web server is accessible to potential attackers.
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 the vendor firmware update released on or after 2018-12-18 to the affected Lexmark devices, and restrict external access to the device web interface where possible.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-18894 — 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-2018-18894 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
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