CVE-2021-44158: ASUS Rt-AX56U Firmware

High severity, CVSS 8.0. EPSS: 0.7% chance of exploitation in the next 30 days.

ASUS RT-AX56U Wi-Fi Router is vulnerable to stack-based buffer overflow due to improper validation for httpd parameter length. An authenticated local area network attacker can launch arbitrary code execution to control the system or disrupt service.

Affected products

• ASUS Rt-AX56U Firmware: version 3.0.0.4.386.44266 only

Published 2022-01-03. Last modified 2026-06-17.