CVE-2022-40104 Memory corruption in n/a

High 7.5 Published 23 Sep 2022 Updated 22 May 2025

Attackers can cause a Denial of Service on Tenda i9 routers by exploiting a buffer overflow in the formwrlSSIDget function.

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-2022-40104?

CVE-2022-40104 is a high-severity memory corruption vulnerability in n/a, published on 23 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Tenda i9 v1.0.0.8(3828) was discovered to contain a buffer overflow via the formwrlSSIDget function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted string.

Weakness: CWE-787

Which versions are affected by CVE-2022-40104?

It affects 1 product.

Products include Tenda I9 Firmware.

How do I fix CVE-2022-40104?

No fix has been published for CVE-2022-40104 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-2022-40104 being exploited?

There is no known exploitation of CVE-2022-40104 in the wild and no public exploit code.

Sources

Also known as GHSA-m7rj-3phc-xm3w.