CVE-2026-30818 OS Command Injection Vulnerability in dnsmasq Module in TP-Link AX53

High 8.5 Published 8 Apr 2026 Updated 7 May 2026

An authenticated adjacent attacker can execute arbitrary code on TP-Link Archer AX53 routers via OS command injection in the dnsmasq module.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-30818?

CVE-2026-30818 is a high-severity command injection vulnerability in TP-Link Systems Inc. AX53 v1.0, published on 8 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An OS command injection vulnerability in the dnsmasq module of TP-Link Archer AX53 v1.0 allows an authenticated adjacent attacker to execute arbitrary code when a specially crafted configuration file is processed due to insufficient input validation. Successful exploitation may allow the attacker to modify device configuration, access sensitive information, or further compromise system integrity.

This issue affects AX53 v1.0: before 1.7.1 Build 20260213.

Weakness: CWE-78

Which versions are affected by CVE-2026-30818?

It affects 1 product.

Products include Tp-Link Archer Ax53 Firmware.

How do I fix CVE-2026-30818?

No fix has been published for CVE-2026-30818 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2026-30818 being exploited?

There is no known exploitation of CVE-2026-30818 in the wild and no public exploit code.

Sources

Also known as GHSA-28h6-3mx2-8gjg.