CVE-2025-11356 Tenda AC23 SetStaticRouteCfg sscanf buffer overflow

High 8.7 Published 7 Oct 2025 Updated 24 Feb 2026

Remote attackers can trigger a buffer overflow in the Tenda AC23 router's static route configuration, potentially leading to code execution or service disruption.

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

What is CVE-2025-11356?

CVE-2025-11356 is a high-severity memory corruption vulnerability in Tenda AC23, published on 7 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was found in Tenda AC23 up to 16.03.07.52. Affected by this issue is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2025-11356?

It affects 1 product.

Products include Tenda Ac23 Firmware.

How do I fix CVE-2025-11356?

No fix has been published for CVE-2025-11356 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-2025-11356 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-11356 exists.

Sources

Also known as GHSA-3r2v-rgxm-vr46.