CVE-2019-12583

CriticalCVSS 9.1/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.0 9.1/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Weakness enumeration

CWE-425

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/Exploit, Third Party Advisory
https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtmlPatch, Vendor Advisory
https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/Exploit, Third Party Advisory
https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtmlPatch, Vendor Advisory

Timeline

Published: Jun 27, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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