CVE-2026-6114

Totolink A7100RU CGI cstecgi.cgi setNetworkCfg os command injection

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Published Apr 12, 2026 CVSS 4.0 · 9.3 Critical EPSS 1.8% KEV · Not listed
Description
A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setNetworkCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument proto results in os command injection. The attack may be initiated remotely. The exploit is now public and may be used.

Analysis

AI-generated

Technical impact

The setNetworkCfg function in /cgi-bin/cstecgi.cgi of the A7100RU firmware accepts a proto parameter that can be manipulated to trigger an OS command injection. This flaw allows remote attackers to execute arbitrary system commands on the router, giving them full control of the device’s operating system. The vulnerability directly compromises the confidentiality, integrity and availability of the router itself.

Affected Systems

The vulnerability affects the Totolink A7100RU router with firmware version 7.4cu.2313_b20191024; no other versions or products are listed as affected.

Risk and Exploitability

The CVSS score of 9.3 marks this as a critical issue. The attack vector is remote, as a crafted HTTP request to cstecgi.cgi can trigger the flaw. The public availability of exploit code suggests a higher likelihood of exploitation, though the exact probability is not quantified in the data provided. Based on the description, it is inferred that the device is commonly exposed to the internet, making it a prime target for attackers seeking to compromise consumer routers. The EPSS score of 2% indicates a low but non-zero exploitation probability and the vulnerability is not listed in the CISA KEV catalog.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest firmware update released by Totolink for the A7100RU router that addresses this vulnerability
  • If no update is available, block external access to the router’s web management interface or disable it entirely
  • Restrict router management access to trusted internal networks or enforce VPN‑only access
  • Monitor router logs and network traffic for signs of unusual command execution or outbound activity
  • Check for further vendor advisories and apply patches as soon as they are released

Generated by OpenCVE AI on October 25, 2026 at 21:10 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 detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setNetworkCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument proto results in os command injection. The attack may be initiated remotely. The exploit is now public and may be used.
Title Totolink A7100RU CGI cstecgi.cgi setNetworkCfg 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 11, 2026, 8:18 AM

View source JSON

Updated
Apr 14, 2026, 3:17 PM

JSON

Status
Deferred
Published
Apr 12, 2026, 4:16 AM
Modified
Oct 26, 2026, 9:10 PM

View source JSON

No data.

Updated
Oct 25, 2026, 9:15 PM

JSON