CVE-2026-4905 Tenda AC5 POST Request WifiWpsOOB formWifiWpsOOB stack-based overflow

High 8.7 Published 26 Mar 2026 Updated 27 Mar 2026

A stack-based buffer overflow in the Tenda AC5 router allows remote attackers to execute arbitrary code via a manipulated POST request.

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-2026-4905?

CVE-2026-4905 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 found in Tenda AC5 15.03.06.47. Impacted is the function formWifiWpsOOB of the file /goform/WifiWpsOOB of the component POST Request Handler. Performing a manipulation of the argument index results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made public and could be used.

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

Which versions are affected by CVE-2026-4905?

It affects 1 product.

Products include Tenda Ac5 Firmware.

How do I fix CVE-2026-4905?

No fix has been published for CVE-2026-4905 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-2026-4905 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4905 exists.

Sources

Also known as GHSA-g25q-4m65-m6g5.