CVE-2021-32030

CRITICAL KEV NUCLEI

ASUS GT-AC2900 & Lyra Mini <3.0.0.4.386.42643/<3.0.0.4.384.46630 - Auth Bypass via Null Byte

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2021-32030 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added June 2, 2025. A Nuclei detection template is also available.

Description

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.

Nuclei Templates (1)

ASUS GT-AC2900 - Authentication Bypass
CRITICALby gy741

Scores

CVSS v3 9.8
EPSS 0.9422
EPSS Percentile 99.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable yes
Technical Impact total

Details

CISA KEV 2025-06-02
VulnCheck KEV 2023-11-16
ENISA EUVD EUVD-2021-18896
CWE
CWE-287
Status published
Products (2)
asus/gt-ac2900_firmware < 3.0.0.4.386.42643
asus/lyra_mini_firmware < 3.0.0.4.384.46630
Published May 06, 2021
KEV Added Jun 02, 2025
Tracked Since Feb 18, 2026