CVE-2019-12583

critical

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.

References

https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml

https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/

Details

Source: Mitre, NVD

Published: 2019-06-27

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 9.1

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

Severity: Critical

EPSS

EPSS: 0.43926