{"id":"CVE-2021-32030","kind":"vulnerability","aliases":["CVE-2021-32030"],"related":[],"title":"The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before…","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.","summary":"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.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2025-06-02T00:00:00+00:00","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"],"how_to_check":null,"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.","status":"open","published_at":"2021-05-06T15:15:07+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:47:01+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:47:01Z","model":"claude-haiku-5-5","output":{"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.","reach":"network","summary":"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.","category":"infrastructure","who_cares":["asus","lyra-mini","gt-ac2900","home-router","small-office"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker gains administrative control of the router and its network traffic.","analyst_note":"Find the ASUS advisory and firmware fix versions for Lyra Mini and GT-AC2900, and check whether a patch exists or the devices are EoL; see CISA KEV entry for CVE-2021-32030.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["other-asus-models","device-not-in-use"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000458,"input_tokens":2578,"output_tokens":400,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2021':16A,19A '-32030':17A,20A '0':137C,145C '3.0.0.4':96C '3.0.0.4.386.42643':11A,91C '384':97C '46630':98C 'ac2900':8A,30A,36B,53B,88C 'access':113C,180C 'activ':76B 'administr':2A,67B,82C,116C 'affect':167C 'allow':99C 'also':166C 'applic':3A,83C 'asus':5A,21A,23A,27A,32B,47B,85C 'attack':62B,133C 'attacker-suppli':132C 'auth':126C 'authent':57B,100C 'bypass':101C 'check':127C 'cisa':72B 'consum':171C 'credenti':71B 'cve':15A,18A 'default':142C 'devic':9A,89C,140C 'disabl':177C 'earlier':156C 'end':161C 'end-of-lif':160C 'eol':164C 'exploit':33B,77B 'featur':181C 'firmware':26A,31A 'flaw':58B 'gt':7A,29A,35B,52B,87C 'gt-ac2900':6A,28A,34B,51B,86C 'handl':121C 'home':38B 'home-rout':37B 'hook.o':130C 'infrastructur':40B 'input':105C 'interfac':68B,117C 'lead':110C 'let':60B 'life':163C 'list':73B 'lyra':13A,24A,42B,48B,93C,153C 'lyra-mini':41B 'match':138C 'mini':14A,25A,43B,49B,94C,154C 'mitig':173C 'note':149C 'offic':46B 'process':103C 'reach':63B 'relat':119C 'remot':104C,179C 'request':122C 'router':39B,54B,65B 'router/httpd/httpd.c':124C 'routers':22A 'situat':148C 'small':45B 'small-offic':44B 'suppli':134C 'unauthent':108C 'unauthor':112C 'unsupport':159C 'user':109C 'valid':70B 'valu':135C,143C 'version':151C 'vulner':170C,175C 'wan':183C 'web':129C 'wild':80B 'without':69B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2021-05-06T15:15:07+00:00","kev":{"dateAdded":"2025-06-02","dueDate":"2025-06-23","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2021-32030","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-32030","severity":null,"published_at":"2025-06-02T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T10:39:05+00:00","note":null},{"source":"nvd","external_id":"CVE-2021-32030","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32030","severity":null,"published_at":"2021-05-06T15:15:07+00:00","modified_at":"2026-06-17T03:52:42+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}