CVE-2022-40869 Memory corruption in n/a

Critical 9.8 Published 23 Sep 2022 Updated 27 May 2025

Stack overflow in Tenda AC15/AC18 routers allows attackers to execute arbitrary code or cause denial of service via crafted DHCP list parameters.

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-2022-40869?

CVE-2022-40869 is a critical 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 AC15 and AC18 routers V15.03.05.19 contain stack overflow vulnerabilities in the function fromDhcpListClient with a combined parameter "list*" ("%s%d","list").

Weakness: CWE-787

Which versions are affected by CVE-2022-40869?

It affects 2 products.

Products include Tendacn Ac15 Firmware, Tendacn Ac18 Firmware.

How do I fix CVE-2022-40869?

No fix has been published for CVE-2022-40869 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-2022-40869 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-40869 exists.

Sources

Also known as GHSA-669q-4gjm-8895.