Actively exploited in the wild
ASUS Routers Improper Authentication Vulnerability
ASUS - 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-2021-32030
CriticalCVSS 9.8KEVSummary
An authentication bypass vulnerability exists in the administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630 when processing remote input from an unauthenticated user, leading to unauthorized access to the administrator interface.
Risk Assessment
An unauthenticated remote attacker could gain access to the router's administrative interface, potentially resulting in full control over the device and network.
Recommendation
Update ASUS GT-AC2900 firmware to version 3.0.0.4.386.42643 or later, and Lyra Mini to version 3.0.0.4_384_46630 or later. Additionally, disable remote access features from WAN.
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Original NVD description (English source)
The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630 allows authentication bypass when processing remote input from an unauthenticated user, leading to unauthorized access to the administrator interface. This relates to handle_request in router/httpd/httpd.c and auth_check in web_hook.o. An attacker-supplied value of '\0' matches the device's default value of '\0' in some situations. Note: All versions of Lyra Mini and earlier which are unsupported (End-of-Life, EOL) are also affected by this vulnerability, Consumers can mitigate this vulnerability by disabling the remote access features from WAN.