CVE-2020-21016 Code injection in n/a

Critical 9.8 Published 31 Oct 2022 Updated 7 May 2025

Remote attackers can execute arbitrary code as root on D-Link DIR-846 routers via a vulnerable HNAP endpoint.

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-2020-21016?

CVE-2020-21016 is a critical code injection vulnerability in n/a, published on 31 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

D-Link DIR-846 devices with firmware 100A35 allow remote attackers to execute arbitrary code as root via HNAP1/control/SetGuestWLanSettings.php.

Weakness: CWE-94

Which versions are affected by CVE-2020-21016?

It affects 1 product.

Products include Dlink Dir-846 Firmware.

How do I fix CVE-2020-21016?

No fix has been published for CVE-2020-21016 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2020-21016 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-21016 exists.

Sources

Also known as GHSA-6p9q-3fp4-ff53.