CVE-2023-35086: ASUS Rt-AC86U Firmware

High severity, CVSS 7.2. EPSS: 38.5% chance of exploitation in the next 30 days.

It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U. This vulnerability is caused by directly using input as a format string when calling syslog in logmessage_normal function, in the do_detwan_cgi module of httpd. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service. This issue affects RT-AX56U V2: 3.0.0.4.386_50460; RT-AC86U: 3.0.0.4_386_51529.

Affected products

• ASUS Rt-AC86U Firmware: version 3.0.0.4_386_51529 only
• ASUS Rt-AX56U v2 Firmware: version 3.0.0.4.386_50460 only

Published 2023-07-21. Last modified 2026-06-17.