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.
Published: 2026-04-12
Score: 9.3 Critical
EPSS: 1.2% Low
KEV: No
Impact: Remote Command Execution
Action: Patch Immediately
AI Analysis

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. The device is commonly exposed to the internet, making it a prime target for attackers seeking to compromise consumer routers. The EPSS score is not available and the vulnerability is not listed in the CISA KEV catalog.

Generated by OpenCVE AI on April 12, 2026 at 05:50 UTC.

Remediation

No vendor fix or workaround currently provided.

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 April 12, 2026 at 05:50 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Tue, 14 Apr 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Mon, 13 Apr 2026 13:00:00 +0000

Type Values Removed Values Added
First Time appeared Totolink a7100ru
Vendors & Products Totolink a7100ru

Sun, 12 Apr 2026 04:00:00 +0000

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'}

Subscriptions

Totolink A7100ru A7100ru Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-04-14T16:33:32.690Z

Reserved: 2026-04-11T08:18:08.440Z

Link: CVE-2026-6114

cve-icon Vulnrichment

Updated: 2026-04-14T15:17:56.752Z

cve-icon NVD

Status : Deferred

Published: 2026-04-12T04:16:49.267

Modified: 2026-04-27T19:05:57.310

Link: CVE-2026-6114

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-13T12:56:20Z

Weaknesses