{"id":"CVE-2019-12583","aliases":["EUVD-2019-4177","GHSA-cq6f-phq5-pc66"],"status":"published","title":"Missing Access Control in the \"Free Time\" component of several Zyxel UAG, USG, and ZyWall devices...","description":"Missing Access Control in the \"Free Time\" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.","severity":{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.43926,"percentile":0.98759,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-425"],"published":"2019-06-27T14:01:02Z","modified":"2026-06-17T02:14:54Z","exploits":[{"source":"nuclei","id":"CVE-2019-12583","title":"Zyxel ZyWall UAG/USG - Account Creation Access","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2019/CVE-2019-12583.yaml"}],"products":[{"vendor":"zyxel","product":"uag2100_firmware"},{"vendor":"zyxel","product":"uag4100_firmware"},{"vendor":"zyxel","product":"uag5100_firmware"},{"vendor":"zyxel","product":"usg1100_firmware"},{"vendor":"zyxel","product":"usg110_firmware"},{"vendor":"zyxel","product":"usg1900_firmware"},{"vendor":"zyxel","product":"usg210_firmware"},{"vendor":"zyxel","product":"usg2200-vpn_firmware"},{"vendor":"zyxel","product":"usg310_firmware"},{"vendor":"zyxel","product":"zywall_1100_firmware"},{"vendor":"zyxel","product":"zywall_110_firmware"},{"vendor":"zyxel","product":"zywall_310_firmware"},{"vendor":"zyxel","product":"zywall_vpn100_firmware"},{"vendor":"zyxel","product":"zywall_vpn300_firmware"}],"references":[{"url":"https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-12583"},{"url":"https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss"},{"url":"https://github.com/advisories/GHSA-cq6f-phq5-pc66"}],"sources":{"cve":[{"id":"CVE-2019-12583","description":"Missing Access Control in the \"Free Time\" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.","status":"published","published":"2019-06-27T14:01:02Z","modified":"2024-08-04T23:24:39.316Z","updated_at":"2026-11-02T14:20:23.697579Z"}],"euvd":[{"id":"EUVD-2019-4177","description":"Missing Access Control in the \"Free Time\" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.","status":"published","published":"2019-06-27T14:01:02Z","modified":"2024-08-04T23:24:39Z","updated_at":"2026-11-03T02:40:45.434408Z"}],"ghsa":[{"id":"GHSA-cq6f-phq5-pc66","title":"Missing Access Control in the \"Free Time\" component of several Zyxel UAG, USG, and ZyWall devices...","description":"Missing Access Control in the \"Free Time\" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.","status":"published","published":"2022-05-24T16:48:44Z","modified":"2024-04-04T01:03:21Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical"}],"cwes":["CWE-425"],"updated_at":"2026-11-02T14:55:55.00861Z"}],"nvd":[{"id":"CVE-2019-12583","description":"Missing Access Control in the \"Free Time\" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.","status":"published","published":"2019-06-27T14:15:10.393Z","modified":"2026-06-17T02:14:54.653Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-425"],"updated_at":"2026-11-02T14:05:17.695191Z"}]}}