CVE-2023-39780 ASUS RT-AX55 Routers OS Command Injection

Exploited in the wild High 8.8 Published 11 Sep 2023 Updated 21 Oct 2025

Authenticated attackers can execute arbitrary OS commands on ASUS RT-AX55 routers via the qos_bw_rulelist parameter.

Exploited in the wild: Since 2 Jun 2025
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-39780?

CVE-2023-39780 is a high-severity command injection vulnerability in ASUS RT-AX55, published on 11 Sep 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command injection via the /start_apply.htm qos_bw_rulelist parameter. NOTE: for the similar "token-generated module" issue, see CVE-2023-41345; for the similar "token-refresh module" issue, see CVE-2023-41346; for the similar "check token module" issue, see CVE-2023-41347; and for the similar "code-authentication module" issue, see CVE-2023-41348.

Weakness: CWE-78

Which versions are affected by CVE-2023-39780?

It affects 1 product.

Products include Asus Rt-Ax55 Firmware.

How do I fix CVE-2023-39780?

No fix has been published for CVE-2023-39780 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 23 Jun 2025.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2023-39780 being exploited?

Yes. Attackers have exploited CVE-2023-39780 in the wild since at least 2 Jun 2025.

Sources

Also known as GHSA-6m5p-5ccp-c8p3.