{"id":"CVE-2026-75578","kind":"vulnerability","aliases":["CVE-2026-75578"],"related":[],"title":"Cudy TR3000 router: authenticated admin can run commands as root","description":"Cudy TR3000 before 2.5.42 contains a command injection vulnerability in luci/model/cbi/vpn/openvpn/client.lua, which embeds the shellquote()-quoted remote host token of an uploaded OpenVPN configuration inside an already single-quoted sed program run by os.execute(), so the nested quotes terminate the outer quote. Authenticated administrators can upload an .ovpn file whose remote host token contains a semicolon to execute arbitrary commands as root.","summary":"Cudy TR3000 firmware before 2.5.42 mishandles the remote host field of an uploaded OpenVPN configuration, so shell quoting breaks and injected text runs as a command. An attacker with administrator login can execute arbitrary commands as root on the router.","severity":"high","cvss":8.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["cudy-tr3000","home-router","infrastructure","luci","openvpn"],"not_affected_if":["admin-access-restricted","firmware-2.5.42-or-later","no-openvpn-client-configured"],"how_to_check":"- Check the firmware version on the router's admin page; versions below `2.5.42` are in the affected range.\n- Confirm whether the router's OpenVPN client configuration upload feature is in use.","fix":"- Cudy TR3000: move to firmware `2.5.42` or later.","status":"open","published_at":"2026-11-13T10:18:17+00:00","first_seen_at":"2026-11-13T10:47:36+00:00","triaged_at":"2026-11-13T10:50:36+00:00","updated_at":"2026-11-13T10:50:36+00:00","category":"infrastructure","confidence":0.8,"triage":{"at":"2026-11-13T10:50:36Z","model":"claude-haiku-5-5","output":{"fix":"- Cudy TR3000: move to firmware `2.5.42` or later.","reach":"network","title":"Cudy TR3000 router: authenticated admin can run commands as root","impact":"high","summary":"Cudy TR3000 firmware before 2.5.42 mishandles the remote host field of an uploaded OpenVPN configuration, so shell quoting breaks and injected text runs as a command. An attacker with administrator login can execute arbitrary commands as root on the router.","audience":"everyone","category":"infrastructure","nicknames":[],"who_cares":["cudy-tr3000","openvpn","home-router","luci"],"confidence":0.8,"fix_status":"available","needs_auth":"yes","worst_case":"Attacker runs arbitrary commands as root on the router.","analyst_note":"","how_to_check":"- Check the firmware version on the router's admin page; versions below `2.5.42` are in the affected range.\n- Confirm whether the router's OpenVPN client configuration upload feature is in use.","plain_action":"Update your Cudy TR3000 router firmware to 2.5.42 or later through its admin page.","product_name":"","needs_analyst":false,"not_affected_if":["firmware-2.5.42-or-later","no-openvpn-client-configured","admin-access-restricted"],"who_is_affected":"Routers running Cudy TR3000 firmware before 2.5.42 where the OpenVPN client page is reachable by an administrator. Exploitation needs an administrator login and a crafted .ovpn file, so devices with strong admin credentials and no remote admin exposure carry less risk.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.000765,"input_tokens":4655,"output_tokens":599,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-75578':13A,16A '2.5.42':30B,69C 'admin':5A 'administr':55B,110C 'alreadi':92C 'arbitrari':59B,125C 'attack':53B 'authent':4A,109C 'break':44B 'command':8A,51B,60B,72C,126C 'configur':40B,89C 'contain':70C,120C 'cudi':1A,18B,26B,66C 'cudy-tr3000':17B 'cve':11A,14A 'emb':78C 'execut':58B,124C 'field':35B 'file':115C 'firmwar':28B 'home':21B 'home-rout':20B 'host':34B,83C,118C 'infrastructur':23B 'inject':46B,73C 'insid':90C 'login':56B 'luci':24B 'luci/model/cbi/vpn/openvpn/client.lua':76C 'mishandl':31B 'nest':103C 'openvpn':25B,39B,88C 'os.execute':100C 'outer':107C 'ovpn':114C 'program':97C 'quot':43B,81C,95C,104C,108C 'remot':33B,82C,117C 'root':10A,62B,128C 'router':3A,22B,65B 'run':7A,48B,98C 'sed':96C 'semicolon':122C 'shell':42B 'shellquot':80C 'singl':94C 'single-quot':93C 'termin':105C 'text':47B 'token':84C,119C 'tr3000':2A,19B,27B,67C 'upload':38B,87C,112C 'vulner':74C 'whose':116C","nicknames":[],"mitigations":[],"who_affected":"Routers running Cudy TR3000 firmware before 2.5.42 where the OpenVPN client page is reachable by an administrator. Exploitation needs an administrator login and a crafted .ovpn file, so devices with strong admin credentials and no remote admin exposure carry less risk.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update your Cudy TR3000 router firmware to 2.5.42 or later through its admin page.","pkeys":[],"ptokens":[],"labels":["cudytr3000","high","homerouter","infrastructure","luci","openvpn"],"campaign_type":null,"search_a":"'-2026':12A,15A '-75578':13A,16A 'admin':5A 'authent':4A 'command':8A 'cudi':1A 'cve':11A,14A 'root':10A 'router':3A 'run':7A 'tr3000':2A","search_b":"'2.5.42':30B 'administr':55B 'arbitrari':59B 'attack':53B 'break':44B 'command':51B,60B 'configur':40B 'cudi':18B,26B 'cudy-tr3000':17B 'execut':58B 'field':35B 'firmwar':28B 'home':21B 'home-rout':20B 'host':34B 'infrastructur':23B 'inject':46B 'login':56B 'luci':24B 'mishandl':31B 'openvpn':25B,39B 'quot':43B 'remot':33B 'root':62B 'router':22B,65B 'run':48B 'shell':42B 'text':47B 'tr3000':19B,27B 'upload':38B","search_c":"'2.5.42':69C 'administr':110C 'alreadi':92C 'arbitrari':125C 'authent':109C 'command':72C,126C 'configur':89C 'contain':70C,120C 'cudi':66C 'emb':78C 'execut':124C 'file':115C 'host':83C,118C 'inject':73C 'insid':90C 'luci/model/cbi/vpn/openvpn/client.lua':76C 'nest':103C 'openvpn':88C 'os.execute':100C 'outer':107C 'ovpn':114C 'program':97C 'quot':81C,95C,104C,108C 'remot':82C,117C 'root':128C 'run':98C 'sed':96C 'semicolon':122C 'shellquot':80C 'singl':94C 'single-quot':93C 'termin':105C 'token':84C,119C 'tr3000':67C 'upload':87C,112C 'vulner':74C 'whose':116C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-13T10:18:17+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/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":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-75578","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75578","severity":null,"published_at":"2026-11-13T10:18:17+00:00","modified_at":"2026-11-13T10:18:17+00:00","first_seen_at":"2026-11-13T10:47:36+00:00","fetched_at":"2026-11-13T10:47:36+00:00","note":null}],"documents":[{"id":145510,"url":"https://www.vulncheck.com/advisories/cudy-tr3000-before-2.5.42-command-injection-via-openvpn-client-configuration-upload","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}