CVE-2025-67187 Memory corruption in n/a

Critical 9.8 Published 3 Feb 2026 Updated 4 Feb 2026

A stack-based buffer overflow in the firewall module allows attackers to execute arbitrary code or cause denial of service on TOTOLINK routers.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-67187?

CVE-2025-67187 is a critical memory corruption vulnerability in n/a, published on 3 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A stack-based buffer overflow vulnerability was identified in TOTOLINK A950RG V4.1.2cu.5204_B20210112. The flaw exists in the setIpQosRules interface of /lib/cste_modules/firewall.so where the comment parameter is not properly validated for length.

Weakness: CWE-121

Which versions are affected by CVE-2025-67187?

It affects 1 product.

Products include Totolink A950rg Firmware.

How do I fix CVE-2025-67187?

No fix has been published for CVE-2025-67187 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-67187 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-67187 exists.

Sources

Also known as GHSA-83jp-7r6c-8wcg.