CVE-2025-67188

CRITICAL

Totolink A950rg Firmware - Buffer Overflow

Title source: rule

Description

A buffer overflow vulnerability exists in TOTOLINK A950RG V4.1.2cu.5204_B20210112. The issue resides in the setRadvdCfg interface of the /lib/cste_modules/ipv6.so module. The function fails to properly validate the length of the user-controlled radvdinterfacename parameter, allowing remote attackers to trigger a stack buffer overflow.

References (1)

[Exploit, Third Party Advisory] https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A950RG/5024-ipv6-setRadvdCfg-radvdinterfacename-buffer.md

View Exploit ZIP pw:eip

Scores

CVSS v3 9.8

EPSS 0.0029

EPSS Percentile 52.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-120

Status published

Products (1)

totolink/a950rg_firmware 4.1.2cu.5204_b20210112

Published Feb 03, 2026

Tracked Since Feb 18, 2026