CVE-2026-7470 Tenda 4G300 SafeMacFilter sub_427C3C stack-based overflow

High 8.7 Published 30 Apr 2026 Updated 4 May 2026

A stack-based buffer overflow in the Tenda 4G300 router allows remote attackers to execute arbitrary code via the SafeMacFilter interface.

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-2026-7470?

CVE-2026-7470 is a high-severity memory corruption vulnerability in Tenda 4G300, published on 30 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A flaw has been found in Tenda 4G300 US_4G300V1.0Mt_V1.01.42_CN_TDC01. Affected is the function sub_427C3C of the file /goform/SafeMacFilter. This manipulation of the argument page causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.

Weakness: CWE-121, CWE-119

Which versions are affected by CVE-2026-7470?

It affects 1 product.

Products include Tenda 4g300 Firmware.

How do I fix CVE-2026-7470?

No fix has been published for CVE-2026-7470 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-2026-7470 being exploited?

There is no known exploitation of CVE-2026-7470 in the wild and no public exploit code.

Sources

Also known as GHSA-jc4x-cmh7-8379.