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OS Command InjectionWeakness · CWE-78

CVE-2026-1723

CRITICAL · 9.2 CVSS v4.0 Published 2026-01-30
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in TOTOLINK X6000R allows OS Command Injection.This issue affects X6000R: through V9.4.0cu.1498_B20250826.

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 confidence

The TOTOLINK X6000R router firmware (through V9.4.0cu.1498_B20250826) contains an OS Command Injection vulnerability (CWE-78) where user-supplied input is not properly sanitized before being passed to system shell commands, allowing authenticated attackers to execute arbitrary operating system commands on the device.

MitigationApply vendor-supplied firmware patches when available; until then, restrict administrative access to trusted networks only and monitor for indicators of compromise.

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
High
Privileges
None
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the device model
    Check the router label or login to the web interface and look for the model number in the status or system information page
    Affected if Device is not a TOTOLINK X6000R router
  2. Check the firmware version
    In the web management interface, navigate to System Status or Firmware Upgrade page and note the firmware version string
    Affected if Firmware version is V9.4.0cu.1498_B20250826 or any earlier version (the vulnerability affects all versions through this release)
  3. Verify web administrative interface accessibility
    Attempt to access the router login page via HTTP/HTTPS from a browser. The vulnerability is in the web interface where user input is processed.
    Affected if Web interface is reachable and accepts authentication
  4. Determine if admin interface is exposed
    Check the router's remote management settings (typically under Advanced or Administration settings) to see if remote web management is enabled and accessible from WAN
    Affected if Remote management is enabled and the admin interface is accessible from untrusted networks (this increases exposure)

You are affected if you have a TOTOLINK X6000R router running firmware version V9.4.0cu.1498_B20250826 or earlier, with the web administrative interface accessible (especially if exposed to untrusted networks).

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply vendor-supplied firmware patches when available; until then, restrict administrative access to trusted networks only and monitor for indicators of compromise.

Have this fixed Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-1723 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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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