{"id":"CVE-2019-12583","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-12583","generatedAt":"2026-10-28T23:58:12.483Z","title":"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.","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.","published":"2019-06-27T14:15:10.000Z","lastModified":"2026-06-17T02:14:55.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":9.1,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"},"cwe":["CWE-425"],"affected":["zyxel/uag2100 firmware","zyxel/uag4100 firmware","zyxel/uag5100 firmware","zyxel/usg110 firmware","zyxel/usg210 firmware","zyxel/usg310 firmware","zyxel/usg1100 firmware","zyxel/usg1900 firmware","zyxel/usg2200-vpn firmware","zyxel/zywall vpn100 firmware","zyxel/zywall vpn300 firmware","zyxel/zywall 110 firmware","zyxel/zywall 310 firmware","zyxel/zywall 1100 firmware"],"epss":{"score":0.43926,"percentile":0.98743,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.29523,"percentile":0.98147},{"date":"2026-09-22","score":0.43926,"percentile":0.98691}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 43.9%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.43926,"from":0.29523,"percentile":0.98691},"summary":"EPSS moved from 29.5% to 43.9% probability of exploitation in the next thirty days."}],"references":[{"url":"https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-12583","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}