CVE-2026-5997
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 detected in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setLoginPasswordCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument admpass results in os command injection. It is possible to launch the attack remotely. The exploit is now public 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 confidenceOS command injection vulnerability in Totolink A7100RU router firmware where the setLoginPasswordCfg function in /cgi-bin/cstecgi.cgi fails to sanitize the admpass parameter, allowing remote attackers to execute arbitrary OS commands via the CGI interface.
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 the device modelCheck the router label, web interface, or system information page to confirm the model is Totolink A7100RUAffected if The device is a Totolink A7100RU router
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Locate the vulnerable CGI endpointAttempt to access or inspect the file /cgi-bin/cstecgi.cgi on the device's web server. This may require authenticated access to the admin panel or firmware extraction.Affected if The file /cgi-bin/cstecgi.cgi exists and contains the setLoginPasswordCfg function
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Check if web management interface is exposedDetermine if the router's HTTP/HTTPS management interface (typically ports 80/443) is reachable from untrusted networks such as the internet or guest network segments.Affected if The CGI interface is accessible from network segments where attackers could reach it
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Identify firmware versionCheck the router's firmware version through the admin web interface (usually under System, Status, or Firmware Upgrade pages) or by extracting firmware if accessible.Affected if The installed firmware version predates any available patch for this command injection vulnerability
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Verify command injection point existsIf you have access, examine the setLoginPasswordCfg function in the CGI binary/script to confirm the admpass parameter is passed to system calls without sanitization.Affected if The admpass parameter is used in unsanitized system() or similar OS command execution calls within the setLoginPasswordCfg function
A user is affected if they operate a Totolink A7100RU router with a vulnerable firmware version where the /cgi-bin/cstecgi.cgi endpoint is accessible and the setLoginPasswordCfg function processes the admpass parameter without sanitization.
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 if available; otherwise, disable remote web management access, implement network segmentation to restrict access to the device's administrative interface, and monitor for exploitation attempts.
- Consultation8.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-5997 — 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-2026-5997 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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- Version or environment caveats, and links to real fixes
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