---
id: CVE-2026-5676
title: A vulnerability was identified in Totolink A8000R 5.9c.681_B20180413
summary: >-
  A vulnerability was identified in Totolink A8000R 5.9c.681_B20180413. This
  issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi.
  Such manipulation of the argument langType leads to missing authentication.
  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-287
  - CWE-306
published: '2026-04-06'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5676'
references:
  - url: >-
      https://github.com/skeetabc/CVE-TOTOLINK-A800R/blob/main/vuln1_auth_bypass.md
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/792433'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/355503'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/355503/cti'
    label: cna@vuldb.com
  - url: 'https://www.totolink.net/'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00405
epssPercentile: 0.34573
ingestedAt: '2026-07-24T09:23:52.263Z'
---

## Overview

A vulnerability was identified in Totolink A8000R 5.9c.681_B20180413. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument langType leads to missing authentication. The attack can be launched remotely. The exploit is publicly available and might be used.

## Remediation

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