Critical severity9.8NVD Advisory· Published Feb 3, 2026· Updated Jun 17, 2026

CVE-2025-67188

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Totolink/A950rg Firmware
cpe:2.3:o:totolink:a950rg_firmware:4.1.2cu.5204_b20210112:*:*:*:*:*:*:*
Totolink/A950RGllm-fuzzy2 versions
V4.1.2cu.5204_B20210112+ 1 more
- (no CPE)range: V4.1.2cu.5204_B20210112
- (no CPE)

Patches

Vulnerability mechanics

References

github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A950RG/5024-ipv6-setRadvdCfg-radvdinterfacename-buffer.mdnvdExploitThird Party Advisory

News mentions

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cvss	0.637
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000