CVE-2026-6131

Totolink A7100RU CGI cstecgi.cgi setTracerouteCfg os command injection

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Published Apr 12, 2026 CVSS 4.0 · 9.3 Critical EPSS 1.9% KEV · Not listed
Description
A vulnerability was found in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this vulnerability is the function setTracerouteCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument command results in os command injection. The attack may be launched remotely. The exploit has been made public and could be used.

Analysis

AI-generated

Technical impact

The function setTracerouteCfg in /cgi-bin/cstecgi.cgi can be manipulated to inject arbitrary operating system commands, resulting in remote code execution. This flaw maps to CWE-77 and CWE-78 and allows an attacker to compromise confidentiality, integrity, and availability of the device and the network.

Affected Systems

The vulnerability affects Totolink A7100RU routers running firmware version 7.4cu.2313_b20191024. No other vendors or products are listed in the CVE record.

Risk and Exploitability

The CVSS score of 9.3 indicates critical severity, but an EPSS score of approximately 1.8% and the vulnerability is not listed in the CISA KEV catalog. Public exploit code has been released and the attack vector is remote, enabling attackers to trigger the injection from outside the local network without prior authentication.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply an up‑to‑date firmware upgrade that removes the vulnerable cstecgi.cgi entry; check Totolink’s support website for the latest A7100RU firmware.
  • If a patch is not yet available, block remote access to /cgi-bin/cstecgi.cgi or disable traceroute configuration functionality via the router’s web interface.
  • Monitor the router’s access logs for repeated attempts to send command parameters to setTracerouteCfg and investigate any suspicious activity.

Generated by OpenCVE AI on October 25, 2026 at 20:45 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}
Type Values Removed Values Added
First Time appeared Totolink a7100ru
Vendors & Products Totolink a7100ru
Type Values Removed Values Added
Description A vulnerability was found in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this vulnerability is the function setTracerouteCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument command results in os command injection. The attack may be launched remotely. The exploit has been made public and could be used.
Title Totolink A7100RU CGI cstecgi.cgi setTracerouteCfg os command injection
First Time appeared Totolink
Totolink a7100ru Firmware
Weaknesses CWE-77
CWE-78
CPEs cpe:2.3:o:totolink:a7100ru_firmware:*:*:*:*:*:*:*:*
Vendors & Products Totolink
Totolink a7100ru Firmware
References
Metrics cvssV2_0

{'score': 10, 'vector': 'AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 9.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P'}
Weaknesses
  • CWE-77

    Improper Neutralization of Special Elements used in a Command ('Command Injection')

  • CWE-78

    Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Sources

Status
PUBLISHED
Assigner
VulDB
Published
Updated
Apr 14, 2026, 4:33 PM
Reserved
Apr 12, 2026, 7:11 AM

View source JSON

Updated
Apr 14, 2026, 3:19 PM

JSON

Status
Deferred
Published
Apr 12, 2026, 11:16 PM
Modified
Oct 26, 2026, 9:10 PM

View source JSON

No data.

Updated
Oct 25, 2026, 8:45 PM

JSON