CVE-2026-26736 Memory corruption in n/a

High 8.8 Published 17 Feb 2026 Updated 9 Mar 2026

A stack-based buffer overflow in the IPv6 setup function allows attackers to execute arbitrary code or cause a denial of service on TOTOLINK routers.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-26736?

CVE-2026-26736 is a high-severity memory corruption vulnerability in n/a, published on 17 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

TOTOLINK A3002RU_V3 V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer overflow via the static_ipv6 parameter in the formIpv6Setup function.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2026-26736?

It affects 1 product.

Products include Totolink A3002ru Firmware.

How do I fix CVE-2026-26736?

No fix has been published for CVE-2026-26736 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-2026-26736 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26736 exists.

Sources

Also known as GHSA-5jg4-px58-ghq6.