{"id":"CVE-2019-3924","aliases":["EUVD-2019-13531","GHSA-4qcw-5w3m-2hfg"],"status":"published","title":"MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an...","description":"MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.15697,"percentile":0.96884,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-441"],"published":"2019-02-20T20:00:00Z","modified":"2026-06-17T02:35:52Z","exploits":[{"source":"exploitdb","id":"EDB-46444","title":"MikroTik RouterOS \u003c 6.43.12 (stable) / \u003c 6.42.12 (long-term) - Firewall and NAT Bypass","type":"remote","platform":"hardware","date":"2019-02-21","verified":true,"url":"https://www.exploit-db.com/exploits/46444"}],"products":[{"vendor":"mikrotik","product":"routeros"},{"vendor":"tenable","product":"mikrotik routeros"}],"references":[{"url":"https://www.exploit-db.com/exploits/46444/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.tenable.com/security/research/tra-2019-07","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/107177","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-3924"},{"url":"https://www.exploit-db.com/exploits/46444"},{"url":"https://github.com/advisories/GHSA-4qcw-5w3m-2hfg"}],"sources":{"cve":[{"id":"CVE-2019-3924","description":"MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities.","status":"published","published":"2019-02-20T20:00:00Z","modified":"2024-09-17T02:46:52.071Z","cwes":["CWE-441"],"updated_at":"2026-11-02T14:20:23.048861Z"}],"euvd":[{"id":"EUVD-2019-13531","description":"MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities.","status":"published","published":"2019-02-20T20:00:00Z","modified":"2024-09-17T02:46:52Z","updated_at":"2026-11-03T00:28:37.764675Z"}],"ghsa":[{"id":"GHSA-4qcw-5w3m-2hfg","title":"MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an...","description":"MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities.","status":"published","published":"2022-05-13T01:31:14Z","modified":"2025-08-15T21:32:18Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-441"],"updated_at":"2026-11-02T15:03:19.214105Z"}],"nvd":[{"id":"CVE-2019-3924","description":"MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities.","status":"published","published":"2019-02-20T20:29:03.047Z","modified":"2026-06-17T02:35:52.33Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-441"],"updated_at":"2026-11-02T14:05:04.689371Z"}]}}