CVE-2025-67188: Totolink a950rg Firmware

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Totolink a950rg Firmware: version 4.1.2cu.5204_b20210112 only

Published 2026-02-03. Last modified 2026-06-17.