---
id: CVE-2026-121598
title: >-
  TOTOLINK A950RG Basic Wireless Configuration cstecgi.cgi strcpy stack-based
  overflow
summary: >-
  A security vulnerability has been detected in TOTOLINK A950RG
  4.1.2cu.5268_B20221104. This impacts the function strcpy of the file
  /cgi-bin/cstecgi.cgi of the component Basic Wireless Configuration Handler.
  The manipulation of the argume…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R'
cvssSource: cna
cwe:
  - CWE-121
  - CWE-119
vendor: TOTOLINK
product: A950RG
affected:
  - A950RG 4.1.2cu.5268_B20221104
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-04T18:59:00.937916Z'
exploitAvailable: true
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T18:59:12.828Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121598'
references:
  - url: 'https://vuldb.com/vuln/430440'
    label: >-
      VDB-430440 | TOTOLINK A950RG Basic Wireless Configuration cstecgi.cgi
      strcpy stack-based overflow
  - url: 'https://vuldb.com/vuln/430440/cti'
    label: 'VDB-430440 | CTI Indicators (IOB, IOC, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-121598'
    label: CVE-2026-121598 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1022559'
    label: >-
      Submit #1022559 | TOTOLINK A950RG V4.1.2cu.5268_B20221104 Stack Buffer
      Overflow
  - url: 'https://gist.github.com/H3rmesk1t/e283a4f3224cbd0a57d4392de60bd2c6'
  - url: 'https://www.totolink.net/'
tags:
  - cve.org
  - exploit-available
epss: 0.00466
epssPercentile: 0.40489
ingestedAt: '2026-11-05T21:36:00.512Z'
---

## Overview

A security vulnerability has been detected in TOTOLINK A950RG 4.1.2cu.5268_B20221104. This impacts the function strcpy of the file /cgi-bin/cstecgi.cgi of the component Basic Wireless Configuration Handler. The manipulation of the argument wepkey leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

## Affected

- `A950RG 4.1.2cu.5268_B20221104`

## Remediation

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