---
id: CVE-2026-121599
title: >-
  TOTOLINK A950RG Multi-SSID Configuration cstecgi.cgi delWiFiMultipleConfig
  stack-based overflow
summary: >-
  A vulnerability was detected in TOTOLINK A950RG 4.1.2cu.5268_B20221104.
  Affected is the function setWiFiMultipleConfig/delWiFiMultipleConfig of the
  file /cgi-bin/cstecgi.cgi of the component Multi-SSID Configuration. The
  manipulation of …
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: '2026-11-07T03:39:50.484698Z'
exploitAvailable: true
published: '2026-11-04'
updated: '2026-11-07'
sourceUpdated: '2026-11-07T03:40:07.092Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121599'
references:
  - url: 'https://vuldb.com/vuln/430441'
    label: >-
      VDB-430441 | TOTOLINK A950RG Multi-SSID Configuration cstecgi.cgi
      delWiFiMultipleConfig stack-based overflow
  - url: 'https://vuldb.com/vuln/430441/cti'
    label: 'VDB-430441 | CTI Indicators (IOB, IOC, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-121599'
    label: CVE-2026-121599 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1022561'
    label: >-
      Submit #1022561 | TOTOLINK A950RG V4.1.2cu.5268_B20221104 Stack Buffer
      Overflow
  - url: 'https://gist.github.com/H3rmesk1t/44673654282c9b21bc8971bab7e4b8a3'
  - url: 'https://www.totolink.net/'
tags:
  - cve.org
  - exploit-available
epss: 0.00466
epssPercentile: 0.40543
ingestedAt: '2026-11-05T20:33:06.653Z'
---

## Overview

A vulnerability was detected in TOTOLINK A950RG 4.1.2cu.5268_B20221104. Affected is the function setWiFiMultipleConfig/delWiFiMultipleConfig of the file /cgi-bin/cstecgi.cgi of the component Multi-SSID Configuration. The manipulation of the argument wepkey2/wepkey3 results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now public 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.