CVE-2025-70656 Memory corruption in n/a

High 7.5 Published 15 Jan 2026 Updated 15 Jan 2026

Attackers can cause a Denial of Service on Tenda AX-1806 routers via a crafted request triggering a stack overflow.

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-2025-70656?

CVE-2025-70656 is a high-severity memory corruption vulnerability in Tenda Ax1806 Firmware, published on 15 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the mac parameter of the sub_65B5C function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

Weakness: CWE-121

Which versions are affected by CVE-2025-70656?

It affects 1 product.

Products include Tenda Ax1806 Firmware.

How do I fix CVE-2025-70656?

No fix has been published for CVE-2025-70656 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-2025-70656 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-70656 exists.

All Tenda Ax1806 Firmware vulnerabilities

Sources

Also known as GHSA-j537-vq7v-4qhp.