CVE-2021-32030
ASUS Routers Improper Authentication Vulnerability
Exploited in the wild
This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2025-06-02. Federal due date: 2025-06-23.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Asus | Lyra Mini Firmware | before 3.0.0.4.384.46630 |
| Asus | Gt-Ac2900 Firmware | before 3.0.0.4.386.42643 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0010.md
- https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AC2900/HelpDesk_BIOS/
- https://www.asus.com/us/supportonly/lyra%20mini/helpdesk_bios/
- https://www.atredis.com/blog/2021/4/30/asus-authentication-bypass
- https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0010.md
- https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AC2900/HelpDesk_BIOS/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-32030