ASUS RT-AX55 Firmware vulnerabilities

14 CVEs affecting ASUS RT-AX55 Firmware, 1 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2023-41348, published 2023-11-03.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2023-39780: ASUS RT-AX55 Routers OS Command Injection Vulnerability, published 2023-09-11. High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2025-06-02. EPSS: 39.5% chance of exploitation in the next 30 days. On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command injection via the /start_apply.htm qos_bw_rulelist parameter. NOTE: for the similar "token-generated module"…
CVE-2021-41435, published 2021-11-19. Critical severity, CVSS 9.8. EPSS: 6.5% chance of exploitation in the next 30 days. A brute-force protection bypass in CAPTCHA protection in ASUS ROG Rapture GT-AX11000, RT-AX3000, RT-AX55, RT-AX56U, RT-AX56U_V2, RT-AX58U, RT-AX82U, RT-AX82U GUNDAM EDITION, RT-AX86…
CVE-2021-41436, published 2021-11-19. High severity, CVSS 7.5. EPSS: 5% chance of exploitation in the next 30 days. An HTTP request smuggling in web application in ASUS ROG Rapture GT-AX11000, RT-AX3000, RT-AX55, RT-AX56U, RT-AX56U_V2, RT-AX58U, RT-AX82U, RT-AX82U GUNDAM EDITION, RT-AX86 Series(RT-AX86U/RT-AX86S),…
CVE-2021-3128, published 2021-04-12. High severity, CVSS 7.5. EPSS: 2.2% chance of exploitation in the next 30 days. 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…
CVE-2021-37910, published 2021-11-12. Medium severity, CVSS 5.3. EPSS: 2.1% chance of exploitation in the next 30 days. ASUS routers Wi-Fi protected access protocol (WPA2 and WPA3-SAE) has improper control of Interaction frequency vulnerability, an unauthenticated attacker can remotely disconnect other users'…
CVE-2022-26376, published 2022-08-05. Critical severity, CVSS 9.8. EPSS: 1.4% chance of exploitation in the next 30 days. A memory corruption vulnerability exists in the httpd unescape functionality of Asuswrt prior to 3.0.0.4.386_48706 and Asuswrt-Merlin New Gen prior to 386.7.. A specially-crafted HTTP request can…
CVE-2023-39238, published 2023-09-07. High severity, CVSS 7.2. EPSS: 1.4% chance of exploitation in the next 30 days. It is identified a format string vulnerability in ASUS RT-AX56U V2. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_svr.cgi module. A remote attacker…
CVE-2023-41348, published 2023-11-03. High severity, CVSS 8.8. EPSS: 1.3% chance of exploitation in the next 30 days. ASUS RT-AX55’s authentication-related function has a vulnerability of insufficient filtering of special characters within its code-authentication module. An authenticated remote attacker can exploit…
CVE-2023-41347, published 2023-11-03. High severity, CVSS 8.8. EPSS: 1.3% chance of exploitation in the next 30 days. ASUS RT-AX55’s authentication-related function has a vulnerability of insufficient filtering of special characters within its check token module. An authenticated remote attacker can exploit this…
CVE-2023-41345, published 2023-11-03. High severity, CVSS 8.8. EPSS: 1.3% chance of exploitation in the next 30 days. ASUS RT-AX55’s authentication-related function has a vulnerability of insufficient filtering of special characters within its token-generated module. An authenticated remote attacker can exploit this…

Latest

CVE-2023-41346, published 2023-11-03. High severity, CVSS 8.8. EPSS: 1.2% chance of exploitation in the next 30 days. ASUS RT-AX55’s authentication-related function has a vulnerability of insufficient filtering of special characters within its token-refresh module. An authenticated remote attacker can exploit this…
CVE-2023-39240, published 2023-09-07. High severity, CVSS 7.2. EPSS: 1.3% chance of exploitation in the next 30 days. It is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi…
CVE-2023-39239, published 2023-09-07. High severity, CVSS 7.2. EPSS: 1.3% chance of exploitation in the next 30 days. It is identified a format string vulnerability in ASUS RT-AX56U V2’s General function API. This vulnerability is caused by lacking validation for a specific value within its apply.cgi module. A…
CVE-2021-43702, published 2022-07-05. Critical severity, CVSS 9.0. EPSS: 1% chance of exploitation in the next 30 days. ASUS RT-A88U 3.0.0.4.386_45898 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…