{"id":"CVE-2021-20999","aliases":["EUVD-2021-8408","GHSA-3qph-f3mq-792v"],"status":"published","title":"WEIDMUELLER: Accidentally open network port in u-controls and IoT-Gateways","description":"In Weidmüller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.","severity":{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00947,"percentile":0.6162,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-668"],"published":"2021-05-13T13:45:25Z","modified":"2026-06-17T03:34:37Z","products":[{"vendor":"weidmueller","product":"iot-gw30-4g-eu_firmware"},{"vendor":"weidmueller","product":"iot-gw30_firmware"},{"vendor":"weidmueller","product":"uc20-wl2000-ac_firmware"},{"vendor":"weidmueller","product":"uc20-wl2000-iot_firmware"},{"vendor":"weidmüller","product":"iot-gw30 (no. 2682620000)"},{"vendor":"weidmüller","product":"iot-gw30-4g-eu (no. 2682630000)"},{"vendor":"weidmüller","product":"uc20-wl2000-ac (no. 1334950000)"},{"vendor":"weidmüller","product":"uc20-wl2000-iot (no. 1334990000)"}],"references":[{"url":"https://cert.vde.com/en-us/advisories/vde-2021-016","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20999"},{"url":"https://github.com/advisories/GHSA-3qph-f3mq-792v"}],"sources":{"cve":[{"id":"CVE-2021-20999","title":"WEIDMUELLER: Accidentally open network port in u-controls and IoT-Gateways","description":"In Weidmüller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.","status":"published","published":"2021-05-13T13:45:25.284Z","modified":"2024-09-17T01:16:17.295Z","cvss":[{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:32:55.905855Z"}],"euvd":[{"id":"EUVD-2021-8408","description":"In Weidmüller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.","status":"published","published":"2021-05-13T13:45:25Z","modified":"2024-09-17T01:16:17Z","cvss":[{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T00:28:51.310992Z"}],"ghsa":[{"id":"GHSA-3qph-f3mq-792v","title":"In Weidmüller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only...","description":"In Weidmüller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.","status":"published","published":"2022-05-24T22:28:09Z","modified":"2023-01-27T05:01:57Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:41:59.85242Z"}],"nvd":[{"id":"CVE-2021-20999","description":"In Weidmüller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.","status":"published","published":"2021-05-13T14:15:18.15Z","modified":"2026-06-17T03:34:37.78Z","cvss":[{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:06:53.343329Z"}]}}