CVE-2021-32030
highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.994 · 100 %ileEURUUSadded 2025-06-02remediate by 2025-06-23
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.
EPSS · scored 2026-10-27
ASUS Routers Improper Authentication Vulnerability
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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ATT&CK techniques
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affected products (5)
Products and version ranges known to be affected.
also known as (4)
Other names and identifiers for this entity.
sources
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references (13)
External citations — patches, advisories, analysis.
- https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0010.mdcnnvd
- https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AC2900/HelpDesk_BIOS/cnnvd
- https://www.asus.com/us/supportonly/lyra%20mini/helpdesk_bios/cnnvd
- https://www.atredis.com/blog/2021/4/30/asus-authentication-bypasscnnvd
- https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0010.mdenisa_euvd
- https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AC2900/HelpDesk_BIOS/enisa_euvd
- https://www.asus.com/us/supportonly/lyra%20mini/helpdesk_bios/enisa_euvd
- https://www.atredis.com/blog/2021/4/30/asus-authentication-bypassenisa_euvd
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