CVE-2017-18855
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 · uneditedNETGEAR WNR854T devices before 1.5.2 are affected by command execution.
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 confidenceNETGEAR WNR854T wireless routers contain a command execution vulnerability that allows attackers to execute arbitrary commands on the affected device. The flaw exists in firmware versions prior to 1.5.2 and likely involves improper input validation or authentication bypass in the web management interface.
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< 1.5.2CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/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 modelCheck the device label on the router or log into the web management interface to confirm the model number displays as NETGEAR WNR854TAffected if The device is a NETGEAR WNR854T router
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Check the installed firmware versionLog into the router web interface (typically http://192.168.1.1 or http://routerlogin.net), navigate to Router Status or Administration > Firmware Upgrade section, and record the firmware version number displayedAffected if The firmware version is shown as less than 1.5.2 (for example, 1.5.1, 1.5.0, or earlier)
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Verify if web management interface is enabledIn the router admin panel, check under Advanced > Administration > Remote Management or similar section to see if web-based management is turned on and accessibleAffected if The web management interface is enabled and reachable from the network (even if restricted to LAN only, the vulnerability is present in the interface code)
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Look for signs of compromiseReview router logs under Administration > Logs or Diagnostics for unexpected commands, shell execution patterns, or unauthorized configuration changesAffected if Logs contain suspicious commands, unfamiliar scripts, or evidence of arbitrary command execution
The environment is affected if it is a NETGEAR WNR854T router running firmware version prior to 1.5.2 with the web management interface enabled.
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 data1.5.2
Upgrade NETGEAR WNR854T firmware to version 1.5.2 or later. If no update is available, consider replacing the end-of-life device, as unsupported routers cannot receive security patches.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2017-18855 — 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-2017-18855 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
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