CVE-2023-39237
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 · uneditedASUS RT-AC86U Traffic Analyzer - Apps analysis function has insufficient filtering of special character. A remote attacker with regular user privilege can exploit this vulnerability to perform command injection attack to execute arbitrary commands, disrupt system or terminate services.
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 confidenceCommand injection vulnerability in ASUS RT-AC86U router's Traffic Analyzer Apps analysis function due to insufficient filtering of special characters. A remote attacker with regular user privileges can inject arbitrary commands through the Apps analysis feature, bypassing the need for administrator access.
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= 3.0.0.4_386_51529CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 router web interface or check device label to confirm model is RT-AC86UAffected if Router model is not RT-AC86U (different models may have different vulnerabilities)
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Check firmware versionNavigate to router web interface > Administration > Firmware Version, or log into router via SSH and run 'nvram get firmware_version' or check /etc/versionAffected if Firmware version is 3.0.0.4_386_51529 exactly (the specific affected version)
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Determine if Traffic Analyzer is enabledLog into router web interface > Traffic Analyzer > Statistics, or check via SSH with 'nvram get apps_analysis_enable' (value of 1 indicates enabled)Affected if Traffic Analyzer feature is enabled and running on the router
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Check router management interface exposureReview router firewall settings and port forwards to determine if web management interface (port 80/443) is accessible from WAN/internet, or run 'iptables -L -n' via SSH to inspect firewall rulesAffected if Management interface is exposed to untrusted networks (internet-accessible)
User is affected if they have an RT-AC86U router running firmware version 3.0.0.4_386_51529 with Traffic Analyzer enabled and potentially exposed to network access beyond the local trusted network.
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 latest ASUS firmware update for RT-AC86U. If no update is available, disable the Traffic Analyzer feature and ensure the router's management interface is not exposed to untrusted networks.
- Consultation2.0 h
- Implementation2.0 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-2023-39237 — 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-2023-39237 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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