{"id":"CVE-2020-28899","aliases":["EUVD-2020-21290","GHSA-345j-gpg7-fhmx"],"status":"published","title":"The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication,...","description":"The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0169,"percentile":0.77235,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-306"],"published":"2021-03-16T16:17:06Z","modified":"2026-06-17T03:10:47Z","products":[{"vendor":"zyxel","product":"lte4506-m606_firmware"},{"vendor":"zyxel","product":"lte7460-m608_firmware"},{"vendor":"zyxel","product":"wah7706_firmware"}],"references":[{"url":"https://www.zyxel.com/support/Zyxel-security-advisory-for-CGI-vulnerability-of-LTE.shtml","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28899"},{"url":"https://github.com/advisories/GHSA-345j-gpg7-fhmx"}],"sources":{"cve":[{"id":"CVE-2020-28899","description":"The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.","status":"published","published":"2021-03-16T16:17:06Z","modified":"2024-08-04T16:41:00.245Z","updated_at":"2026-11-02T14:35:57.017407Z"}],"euvd":[{"id":"EUVD-2020-21290","description":"The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.","status":"published","published":"2021-03-16T16:17:06Z","modified":"2024-08-04T16:41:00Z","updated_at":"2026-11-03T03:07:09.169254Z"}],"ghsa":[{"id":"GHSA-345j-gpg7-fhmx","title":"The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication,...","description":"The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.","status":"published","published":"2022-05-24T17:44:37Z","modified":"2023-01-29T05:06:53Z","cwes":["CWE-306"],"updated_at":"2026-11-02T14:46:06.857512Z"}],"nvd":[{"id":"CVE-2020-28899","description":"The Web CGI Script on ZyXEL LTE4506-M606 V1.00(ABDO.2)C0 devices does not require authentication, which allows remote unauthenticated attackers (via crafted JSON action data to /cgi-bin/gui.cgi) to use all features provided by the router. Examples: change the router password, retrieve the Wi-Fi passphrase, send an SMS message, or modify the IP forwarding to access the internal network.","status":"published","published":"2021-03-16T17:15:13.307Z","modified":"2026-06-17T03:10:47.557Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:06:37.687844Z"}]}}