CVE-2021-32030
9.8, critical Known exploitedASUS Routers Improper Authentication Vulnerability
- CVSS
- 9.8, critical critical CVSS v3.1
- EPSS, next 30 days
- 99% higher than 99.9% of scored CVEs
- Exploitation
- Confirmed in the wild
- Published
- 6 May 20215 years ago
Known exploited
CISA added this to the Known Exploited Vulnerabilities Catalog on 2 Jun 2025. US federal agencies had to remediate by 23 Jun 2025, a deadline that has passed.
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.
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.
Details
- Vendor
- ASUS
- Product
- Lyra Mini Firmware
- Weakness
- CWE-287 (opens in a new tab)
- Status
- Analyzed
- Updated
- 17 Jun 2026
- Assigner
- cve@mitre.org
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References 5
Exploit code 2
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Other ASUS CVEs
Every ASUS CVE we holdSame vendor in what we hold, not a known link between the flaws.
- CVE-2025-59374 ASUS Live Update Embedded Malicious Code Vulnerability KEV EPSS 1% 9.8, critical
- CVE-2023-39780 ASUS RT-AX55 Routers OS Command Injection Vulnerability KEV EPSS 40% 8.8, high
Beyond this page
Is CVE-2021-32030 in your network?
This page tells you how dangerous CVE-2021-32030 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
CVE-2021-32030 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.
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EXYS7600 OCELOT
Find it before attackers do
Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2021-32030 comes with the devices to patch.
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EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.