CVE-2026-4902 Tenda AC5 POST Request addressNat fromAddressNat memory corruption

High 8.7 Published 26 Mar 2026 Updated 27 Mar 2026

Remote attackers can trigger a stack-based buffer overflow in the Tenda AC5 router via a crafted POST request, 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-2026-4902?

CVE-2026-4902 is a high-severity memory corruption vulnerability in Tenda AC5, published on 26 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was detected in Tenda AC5 15.03.06.47. This affects the function fromAddressNat of the file /goform/addressNat of the component POST Request Handler. The manipulation of the argument page results in stack-based buffer overflow. The attack can be launched remotely. The exploit is now public and may be used.

Weakness: CWE-121, CWE-787, CWE-119

Which versions are affected by CVE-2026-4902?

It affects 1 product.

Products include Tenda Ac5 Firmware.

How do I fix CVE-2026-4902?

No fix has been published for CVE-2026-4902 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-2026-4902 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4902 exists.

Sources

Also known as GHSA-hpg8-x2mf-jw6x.