CVE-2021-32030
Published May 6, 2021
Last updated 11 days ago
AI description
CVE-2021-32030 is an authentication bypass vulnerability affecting ASUS GT-AC2900 devices before version 3.0.0.4.386.42643 and Lyra Mini devices before version 3.0.0.4_384_46630. The vulnerability stems from how the administrator application processes remote input from unauthenticated users. Specifically, the vulnerability allows an attacker to gain unauthorized access to the administrator interface. This is because an attacker-supplied null byte ('\0') can match the device's default null byte value in certain situations during the authentication process. Successful exploitation could allow attackers to modify router settings, intercept network traffic, and potentially install malicious firmware.
- 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.
- Source
- cve@mitre.org
- NVD status
- Analyzed
CVSS 3.1
- Type
- Primary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
CVSS 2.0
- Type
- Primary
- Base score
- 7.5
- Impact score
- 6.4
- Exploitability score
- 10
- Vector string
- AV:N/AC:L/Au:N/C:P/I:P/A:P
Data from CISA
- Vulnerability name
- ASUS Routers Improper Authentication Vulnerability
- Exploit added on
- Jun 2, 2025
- Exploit action due
- Jun 23, 2025
- 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.
- Hype score
- Not currently trending
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