{"id":"CVE-2026-75753","kind":"vulnerability","aliases":["CVE-2026-75753"],"related":[],"title":"ASUS routers: unauthenticated nearby HTTP commands return device info and force a mode","description":"Missing Authentication for a Critical Function  in certain ASUS routers allows an unauthorized nearby user to send specific commands via HTTP requests, causing the router to return device identification information and switch into a specific mode. As a result, when the router encounters abnormal conditions, it may be unable to perform self-recovery.\nRefer to the '\nSecurity Update for ASUS Router Firmware' section on the ASUS Security Advisory for more information.","summary":"Certain ASUS routers accept specific HTTP commands without authentication, so a nearby unauthorized user can get device identification information. The same commands switch the router into a specific mode that may prevent it from self-recovering after abnormal conditions.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["asus","firmware","infrastructure","routers","self-hosted"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"- Update ASUS router firmware to the version named in the ASUS Security Advisory (version not stated in the sources)","status":"open","published_at":"2026-10-20T02:17:11+00:00","first_seen_at":"2026-10-23T21:57:19+00:00","triaged_at":"2026-10-25T04:24:58+00:00","updated_at":"2026-10-25T04:24:58+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-25T04:24:58Z","model":"claude-haiku-5-5","output":{"fix":"- Update ASUS router firmware to the version named in the ASUS Security Advisory (version not stated in the sources)","reach":"network","title":"ASUS routers: unauthenticated nearby HTTP commands return device info and force a mode","impact":"low","summary":"Certain ASUS routers accept specific HTTP commands without authentication, so a nearby unauthorized user can get device identification information. The same commands switch the router into a specific mode that may prevent it from self-recovering after abnormal conditions.","category":"infrastructure","nicknames":[],"who_cares":["asus","routers","firmware","self-hosted"],"confidence":0.5,"needs_auth":"no","worst_case":"Device info leaks and router may fail to self-recover","analyst_note":"Find the affected ASUS models, fixed firmware versions and the advisory URL from ASUS Security Advisory; the sources give none.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Owners of the listed ASUS router models whose firmware predates the ASUS security update. The sources do not name the models or versions, and the flaw needs a nearby network position rather than internet access. Teams that do not run these ASUS routers can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000569,"input_tokens":3361,"output_tokens":466,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-75753':16A,19A 'abnorm':65B,110C 'accept':30B 'advisori':135C 'allow':77C 'asus':1A,20B,28B,75C,127C,133C 'authent':35B,68C 'caus':89C 'certain':27B,74C 'command':6A,33B,48B,85C 'condit':66B,111C 'critic':71C 'cve':14A,17A 'devic':8A,43B,94C 'encount':109C 'firmwar':21B,129C 'forc':11A 'function':72C 'get':42B 'host':26B 'http':5A,32B,87C 'identif':44B,95C 'info':9A 'inform':45B,96C,138C 'infrastructur':22B 'may':57B,113C 'miss':67C 'mode':13A,55B,102C 'nearbi':4A,38B,80C 'perform':117C 'prevent':58B 'recov':63B 'recoveri':120C 'refer':121C 'request':88C 'result':105C 'return':7A,93C 'router':2A,23B,29B,51B,76C,91C,108C,128C 'section':130C 'secur':124C,134C 'self':25B,62B,119C 'self-host':24B 'self-recov':61B 'self-recoveri':118C 'send':83C 'specif':31B,54B,84C,101C 'switch':49B,98C 'unabl':115C 'unauthent':3A 'unauthor':39B,79C 'updat':125C 'user':40B,81C 'via':86C 'without':34B","nicknames":[],"mitigations":[],"who_affected":"Owners of the listed ASUS router models whose firmware predates the ASUS security update. The sources do not name the models or versions, and the flaw needs a nearby network position rather than internet access. Teams that do not run these ASUS routers can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T02:17:11+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"54bf65a7-a193-42d2-b1ba-8e150d3c35e1","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-75753","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75753","severity":null,"published_at":"2026-10-20T02:17:11+00:00","modified_at":"2026-10-20T20:17:24+00:00","first_seen_at":"2026-10-23T21:57:19+00:00","fetched_at":"2026-10-23T22:28:57+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"}