{"id":"CVE-2018-14847","kind":"vulnerability","aliases":["CVE-2018-14847"],"related":[],"title":"MikroTik RouterOS: MikroTik Router OS Directory Traversal Vulnerability","description":"MikroTik RouterOS through 6.42 allows unauthenticated remote attackers to read arbitrary files and remote authenticated attackers to write arbitrary files due to a directory traversal vulnerability in the WinBox interface.\n\nCISA required action: Apply updates per vendor instructions.","summary":"MikroTik RouterOS through 6.42 has a directory traversal flaw in its WinBox management interface. An unauthenticated remote attacker can read arbitrary files on the router, and an authenticated attacker can write arbitrary files.","severity":"critical","cvss":9.1,"epss":0.95981,"exploited":true,"exploited_at":"2021-12-01T00:00:00+00:00","products":[{"name":"MikroTik RouterOS","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","mikrotik","routeros","self-hosted","winbox"],"not_affected_if":["patched-routeros","winbox-not-exposed"],"how_to_check":"Check the RouterOS version under System > Packages or with /system resource print; versions through 6.42 are affected.\nCheck whether WinBox (TCP 8291) is reachable from the internet.","fix":"Upgrade RouterOS to a release later than 6.42 per the vendor instructions.\nRestrict WinBox access to trusted management networks until patched.","status":"open","published_at":"2018-08-02T07:29:00+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:31:59+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"infrastructure","confidence":0.8,"triage":{"at":"2026-10-23T21:31:59Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade RouterOS to a release later than 6.42 per the vendor instructions.\nRestrict WinBox access to trusted management networks until patched.","reach":"internet","impact":"high","summary":"MikroTik RouterOS through 6.42 has a directory traversal flaw in its WinBox management interface. An unauthenticated remote attacker can read arbitrary files on the router, and an authenticated attacker can write arbitrary files.","category":"infrastructure","who_cares":["mikrotik","routeros","winbox","self-hosted"],"confidence":0.8,"needs_auth":"no","worst_case":"Attacker reads router config and secrets; writes arbitrary files remotely","analyst_note":"Confirm the fixed RouterOS version and the exact WinBox port and exposure checks at the MikroTik advisory and the CISA KEV entry.","how_to_check":"Check the RouterOS version under System > Packages or with /system resource print; versions through 6.42 are affected.\nCheck whether WinBox (TCP 8291) is reachable from the internet.\nunknown","needs_analyst":true,"not_affected_if":["patched-routeros","winbox-not-exposed"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"critical"},"cost_usd":0.000509,"input_tokens":2859,"output_tokens":446,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-14847':11A,14A '-2018':10A,13A '6.42':28B,61C 'action':90C 'allow':62C 'appli':91C 'arbitrari':45B,56B,68C,76C 'attack':42B,53B,65C,73C 'authent':52B,72C 'cisa':88C 'cve':9A,12A 'directori':6A,31B,81C 'due':78C 'exploit':17B 'file':46B,57B,69C,77C 'flaw':33B 'host':23B 'infrastructur':18B 'instruct':95C 'interfac':38B,87C 'manag':37B 'mikrotik':1A,3A,15A,19B,25B,58C 'os':5A 'per':93C 'read':44B,67C 'remot':41B,64C,71C 'requir':89C 'router':4A,49B 'routero':2A,20B,26B,59C 'routeros':16A 'self':22B 'self-host':21B 'travers':7A,32B,82C 'unauthent':40B,63C 'updat':92C 'vendor':94C 'vulner':8A,83C 'winbox':24B,36B,86C 'write':55B,75C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2018-08-02T07:29:00+00:00","kev":{"dateAdded":"2021-12-01","dueDate":"2022-06-01","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:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2018-14847","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-14847","severity":null,"published_at":"2021-12-01T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T19:35:26+00:00","note":null},{"source":"epss","external_id":"CVE-2018-14847","url":"https://api.first.org/data/v1/epss?cve=CVE-2018-14847","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-2018-14847","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-14847","severity":null,"published_at":"2018-08-02T07:29:00+00:00","modified_at":"2026-06-17T01:41:44+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}