---
id: "CVE-2021-32030"
kind: "vulnerability"
aliases: ["CVE-2021-32030"]
title: "The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before\u2026"
severity: "critical"
cvss: 9.8
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "ASUS Routers", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "asus lyra mini firmware", "fixed": ["3.0.0.4.384.46630"], "affected": "< 3.0.0.4.384.46630", "ecosystem": "vendor"}, {"name": "asus gt-ac2900 firmware", "fixed": ["3.0.0.4.386.42643"], "affected": "< 3.0.0.4.386.42643", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["asus", "exploited", "gt-ac2900", "home-router", "infrastructure", "lyra-mini", "small-office"]
not_affected_if: ["device-not-in-use", "other-asus-models"]
published_at: "2021-05-06T15:15:07+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-32030", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32030", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before…

ASUS Lyra Mini and GT-AC2900 routers have an authentication flaw that lets an attacker reach the router's administrative interface without valid credentials. CISA lists it as actively exploited in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:ASUS Routers affected ? fixed ?
- vendor:asus lyra mini firmware affected < 3.0.0.4.384.46630 fixed 3.0.0.4.384.46630
- vendor:asus gt-ac2900 firmware affected < 3.0.0.4.386.42643 fixed 3.0.0.4.386.42643

## Fix

Apply the vendor mitigations per ASUS instructions, or discontinue use of the affected device if no mitigation exists; the sources say these products may be end-of-life or end-of-service.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-32030
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2021-32030

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_