CVE-2021-32030 KEV
Patch first
On CISA KEV — known exploited in the wild, due 2025-06-23.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 99.39% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-287 |
| On CISA KEV | yes — remediate by 2025-06-23 |
| Public exploit | none known |
| Published | 2021-05-06 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | ASUS Routers Improper Authentication Vulnerability |
|---|---|
| Added | 2025-06-02 |
| Due | 2025-06-23 |
| Vendor / product | ASUS / Routers |
| Ransomware use | none reported |
Affected (4)
| Vendor | Product |
|---|---|
| asus | gt-ac2900 |
| asus | gt-ac2900 firmware |
| asus | lyra mini |
| asus | lyra mini firmware |
References
- 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
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