Actively exploited in the wild
ASUS RT-AX55 Routers OS Command Injection Vulnerability
ASUS - RT-AX55 Routers · Listed in the CISA KEV since 2025-06-02. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE-2023-39780
HighCVSS 8.8KEVSummary
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. Similar issues affect token generation, refresh, check, and code authentication modules (CVE-2023-41345 through CVE-2023-41348).
Risk Assessment
An attacker with valid credentials can execute arbitrary commands on the router, potentially leading to full device compromise and network traffic interception.
Recommendation
Update ASUS RT-AX55 router firmware to the latest version. Change default passwords and restrict administrative access to trusted networks.
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Original NVD description (English source)
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" issue, see CVE-2023-41345; for the similar "token-refresh module" issue, see CVE-2023-41346; for the similar "check token module" issue, see CVE-2023-41347; and for the similar "code-authentication module" issue, see CVE-2023-41348.