CVE-2026-6168
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 flaw has been found in TOTOLINK A7000R up to 9.1.0u.6115. The affected element is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument ssid5g causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
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 confidenceStack-based buffer overflow in the setWiFiEasyGuestCfg function of TOTOLINK A7000R routers (versions up to 9.1.0u.6115) in the /cgi-bin/cstecgi.cgi binary. The ssid5g parameter is not properly bounds-checked before being copied to a stack buffer, allowing remote attackers to potentially execute arbitrary code by overflowing the buffer with crafted input.
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
- 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.
-
Confirm device model is TOTOLINK A7000RCheck the router's web interface status page, firmware info section, or look for 'A7000R' markings on the device hardware for model identificationAffected if Device is not a TOTOLINK A7000R router
-
Check firmware versionAccess router web UI, navigate to System or Firmware settings, and record the firmware version number shownAffected if Firmware version is 9.1.0u.6115 or any earlier version (the vulnerability exists in versions up to and including 9.1.0u.6115)
-
Verify cgi-bin/cstecgi.cgi is accessibleAttempt to access http://<router_ip>/cgi-bin/cstecgi.cgi from within the local network using a web browser or curl commandAffected if The CGI endpoint responds (indicates it is exposed and potentially reachable)
-
Check if WiFi Easy Guest feature is enabledLog into router web UI, navigate to Wireless or Guest Network settings, and determine if the Easy Guest (setWiFiEasyGuestCfg) feature is configured or activeAffected if The Easy Guest network feature is enabled - this is the function that contains the vulnerable setWiFiEasyGuestCfg code path
User is affected if they have a TOTOLINK A7000R router running firmware version 9.1.0u.6115 or earlier, with the cgi-bin/cstecgi.cgi endpoint accessible and the WiFi Easy Guest feature 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 dataApply vendor firmware patch when available; until then, disable or restrict access to the affected cgi-bin/cstecgi.cgi endpoint at the network boundary to limit attack surface.
- Consultation3.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,720.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-6168 — 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-2026-6168 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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
- No spam, self-promotion, credentials, or personal data