CVE-2026-18167

High

Description

A stack-based buffer overflow vulnerability exists in the EasyMesh module of TP-Link Archer AX55 v4. When Mesh mode is enabled, a LAN attacker may submit crafted input that causes the easymesh daemon to crash and may potentially achieve remote code execution on the device. Successful exploitation may cause the EasyMesh daemon to crash and may potentially allow remote code execution when Mesh mode is enabled. This may result in high impact to the confidentiality, integrity, and availability of the affected device.

SeverityHigh

CVSS7.7

Exploit probability—

ProductArcher AX55 v4

PublishedSep 3, 2026

First seenSep 3, 2026

Weakness typeCWE-121CWE-121

How to fix

Update

TP-Link Systems Inc. Archer AX55 v41.2.1 Build 20260527 or later

Patches

tp-link.com/us/support/download/archer-ax55/v4/#Firmware

Vendor advisories

tp-link.com/us/support/faq/5279/

Affected products

Product	Affected versions	Fixed in
TP-Link Systems Inc. Archer AX55 v4	v < 1.2.1 Build 20260527	1.2.1 Build 20260527

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