---
id: CVE-2026-5691
title: A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024
summary: >-
  A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This
  affects the function setFirewallType of the file /cgi-bin/cstecgi.cgi. The
  manipulation of the argument firewallType leads to os command injection. The
  attack …
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-77
  - CWE-78
published: '2026-04-06'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5691'
references:
  - url: >-
      https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_189/README.md
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/792962'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/355518'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/355518/cti'
    label: cna@vuldb.com
  - url: 'https://www.totolink.net/'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.0206
epssPercentile: 0.80489
ingestedAt: '2026-07-24T09:23:52.642Z'
---

## Overview

A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setFirewallType of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument firewallType leads to os command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.