CVE-2026-30814 Buffer Overflow Vulnerability in TP-Link AX53

High 7.3 Published 8 Apr 2026 Updated 7 May 2026

An authenticated adjacent attacker can trigger a stack-based buffer overflow in TP-Link Archer AX53 routers, potentially executing arbitrary code or causing a crash.

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-2026-30814?

CVE-2026-30814 is a high-severity memory corruption 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

A stack-based buffer overflow in the tmpServer module of TP-Link Archer AX53 v1.0 allows an authenticated adjacent attacker to trigger a segmentation fault and potentially execute arbitrary code via a specially crafted configuration file. Successful exploitation may cause a crash and could allow arbitrary code execution, enabling modification of device state, exposure of sensitive data, or further compromise of device integrity.

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

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2026-30814?

It affects 1 product.

Products include Tp-Link Archer Ax53 Firmware.

How do I fix CVE-2026-30814?

No fix has been published for CVE-2026-30814 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-2026-30814 being exploited?

There is no known exploitation of CVE-2026-30814 in the wild and no public exploit code.

Sources

Also known as GHSA-w4qp-mpq3-cw45.