{"id":"CVE-2018-14558","kind":"vulnerability","aliases":["CVE-2018-14558"],"related":[],"title":"Tenda AC7, AC9, and AC10 Routers: Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability","description":"An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7), AC9 devices with firmware through V15.03.05.19(6318)_CN(AC9), and AC10 devices with firmware through V15.03.06.23_CN(AC10). A command Injection vulnerability allows attackers to execute arbitrary OS commands via a crafted goform/setUsbUnload request. This occurs because the \"formsetUsbUnload\" function executes a dosystemCmd function with untrusted input.","summary":"Tenda AC7, AC9 and AC10 routers running older firmware have a command injection flaw in the goform/setUsbUnload handler. An attacker who can send a crafted request to the router can run arbitrary OS commands on it.","severity":"critical","cvss":10.0,"epss":0.0851,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Tenda AC7, AC9, and AC10 Routers","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","home-network","infrastructure","routers","self-hosted","tenda"],"not_affected_if":["firmware-newer-than-affected","other-tenda-models","remote-admin-disabled"],"how_to_check":"Log into the router admin UI and read the firmware version; compare it to the affected builds (AC7 through V15.03.06.44_CN, AC9 through V15.03.05.19(6318)_CN, AC10 through V15.03.06.23_CN).","fix":"Update the router to a firmware build newer than the affected versions listed in the NVD entry; if none is available, unknown.\nDisable remote administration and keep the admin interface off the internet.","status":"open","published_at":"2018-10-30T18:29:00+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T20:29:30+00:00","updated_at":"2026-10-23T20:29:30+00:00","category":"infrastructure","confidence":0.8,"triage":{"at":"2026-10-23T20:29:30Z","model":"claude-haiku-5-5","output":{"fix":"Update the router to a firmware build newer than the affected versions listed in the NVD entry; if none is available, unknown.\nDisable remote administration and keep the admin interface off the internet.","summary":"Tenda AC7, AC9 and AC10 routers running older firmware have a command injection flaw in the goform/setUsbUnload handler. An attacker who can send a crafted request to the router can run arbitrary OS commands on it.","category":"infrastructure","who_cares":["tenda","routers","self-hosted","home-network"],"confidence":0.8,"analyst_note":"Confirm the fixed firmware version for AC7, AC9 and AC10 from Tenda's vendor advisory; the sources list only affected-through versions.","how_to_check":"Log into the router admin UI and read the firmware version; compare it to the affected builds (AC7 through V15.03.06.44_CN, AC9 through V15.03.05.19(6318)_CN, AC10 through V15.03.06.23_CN).\nunknown","needs_analyst":true,"not_affected_if":["other-tenda-models","firmware-newer-than-affected","remote-admin-disabled"],"severity_if_unknown":"critical"},"cost_usd":0.000428,"input_tokens":2237,"output_tokens":409,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-14558':18A,21A '-2018':17A,20A '6318':91C 'ac10':5A,11A,26A,42B,95C,101C 'ac7':2A,8A,23A,39B,78C,84C 'ac9':3A,9A,24A,40B,85C,93C 'allow':106C 'and':25A 'arbitrari':69B,110C 'attack':57B,107C 'cn':92C 'command':13A,49B,71B,103C,112C 'craft':62B,115C 'cve':16A,19A 'devic':79C,86C,96C 'discov':75C 'dosystemcmd':126C 'execut':109C,124C 'exploit':28B 'firmwar':46B,81C,88C,98C 'flaw':51B 'formsetusbunload':122C 'function':123C,127C 'goform/setusbunload':54B,116C 'handler':55B 'home':30B 'home-network':29B 'host':36B 'infrastructur':32B 'inject':14A,50B,104C 'input':130C 'issu':73C 'network':31B 'occur':119C 'older':45B 'os':70B,111C 'request':63B,117C 'router':6A,12A,33B,43B,66B 'routers':27A 'run':44B,68B 'self':35B 'self-host':34B 'send':60B 'tenda':1A,7A,22A,37B,38B,77C 'untrust':129C 'v15.03.05.19':90C 'v15.03.06.23_cn':100C 'v15.03.06.44_cn':83C 'via':113C 'vulner':15A,105C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2018-10-30T18:29:00+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"Apply updates per vendor instructions.","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-2018-14558","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-14558","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T10:39:08+00:00","note":null},{"source":"epss","external_id":"CVE-2018-14558","url":"https://api.first.org/data/v1/epss?cve=CVE-2018-14558","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2018-14558","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-14558","severity":null,"published_at":"2018-10-30T18:29:00+00:00","modified_at":"2026-06-17T01:41:11+00:00","first_seen_at":"2026-10-23T19:35:23+00:00","fetched_at":"2026-10-23T19:35:23+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"}