ASUS RT-AC66U B1 3.0.0.4.28651665 was discovered to transmit sensitive information in cleartext.
In ASUS RT-AX3000, ZenWiFi AX (XT8), RT-AX88U, and other ASUS routers with firmware < 3.0.0.4.386.42095 or < 9.0.0.4.386.41994, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set.
Stack buffer overflow in httpd in Asuswrt-Merlin firmware 380.670RT-AC5300 and earlier for ASUS devices and ASUS firmware for ASUS RT-AC5300, RTAC1900P, RT-AC68U, RT-AC68P, RT-AC88U, RT-AC66U, RT-AC66UB1, RT-AC58U, RT-AC56U, RT-AC55U, RT-AC52U, RT-AC51U, RT-N18U, RT-N66U, RT-N56U, RT-AC3200, RT-AC3100, RTAC1200GU, RTAC1200G, RT-AC1200, RT-AC53, RT-N12HP, RT-N12HPB1, RT-N12D1, RT-N12+, RTN12+PRO, RT-N16, and RT-N300 devices allows remote attackers to execute arbitrary code on the router by sending a crafted http GET request packet that includes a long deleteofflineclient parameter in the url.
An issue was discovered in ASUSWRT 3.0.0.4.384.20308. An unauthenticated user can request /updateapplist.asp to see if a USB device is attached to the router and if there are apps installed on the router.
An issue was discovered in ASUSWRT 3.0.0.4.384.20308. An unauthenticated user can trigger a DoS of the httpd service via the /APPInstallation.asp?= URI.
An issue was discovered in ASUSWRT 3.0.0.4.384.20308. When processing the /startapply.htm POST data, there is a command injection issue via shell metacharacters in the fbemail parameter. By using this issue, an attacker can control the router and get shell.
ASUS RT-A88U 3.0.0.4.38645898 is vulnerable to Cross Site Scripting (XSS). The ASUS router admin panel does not sanitize the WiFI logs correctly, if an attacker was able to change the SSID of the router with a custom payload, they could achieve stored XSS on the device.