CVE-2026-9385
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 · uneditedA vulnerability was determined in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function setTracerouteCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. This manipulation of the argument command causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.
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 confidenceOS command injection vulnerability in Totolink A8000RU router's web management interface (cgi-bin/cstecgi.cgi). The setTracerouteCfg function fails to properly sanitize the 'command' argument, allowing remote attackers to execute arbitrary operating system commands on the device.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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:3.1/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 device modelAccess the router's web management interface and check the system status or device info page for the model number, or use network scanning to identify the device via MAC OUI or HTTP response headersAffected if Device is a Totolink A8000RU router
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Check if web interface is remotely accessibleAttempt to access the router's web interface (port 80/443) from an external network IP address, or review firewall/NAT rules to determine if the management interface is exposed to the internetAffected if The cstecgi.cgi interface is reachable from untrusted networks (especially the internet)
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Verify cstecgi.cgi is presentSend an HTTP GET or POST request to /cstecgi.cgi on the router's IP address. This endpoint is part of the standard firmware and handles traceroute configuration functionsAffected if The endpoint responds (indicating the vulnerable CGI binary exists on the device)
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Check firmware versionAccess the router's web interface admin panel, navigate to System Status or Firmware Upgrade section to view the installed firmware version. If CLI access is available, check via telnet/ssh if supportedAffected if Firmware version is within any vulnerable release range (compare to any Totolink security advisories for this CVE)
The device is affected if it is a Totolink A8000RU with the vulnerable cstecgi.cgi endpoint exposed and running a firmware version that has not been patched for this command injection flaw.
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 update when available. Until then, disable remote access to the web management interface from untrusted networks or segment the device in a restricted network zone.
- Consultation2.0 h
- Implementation3.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-9385 — 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-2026-9385 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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