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CVE-2021-40556

HIGH CVSS: 8.8 Published: 2022-10-06 Modified: 2026-06-17

Description

A stack overflow vulnerability exists in the httpd service in ASUS RT-AX56U Router Version 3.0.0.4.386.44266. This vulnerability is caused by the strcat function called by "caupload" input handle function allowing the user to enter 0xFFFF bytes into the stack. This vulnerability allows an attacker to execute commands remotely. The vulnerability requires authentication.

Affected Platforms

Asus Rt-Ax56UAsus Rt-Ax56U Firmware

Weakness Type

CWE-787

References