CVE-2019-12583
9.1
CRITICAL · CVSS 3.0 · EPSS 43.9% (pctl 99)
Patch early
EPSS 43.9% — above the 10% action threshold.
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.
Scoring
| CVSS | 9.1 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| EPSS | 43.93% — more likely to be exploited than 99% of all CVEs |
| Weakness | CWE-425 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2019-06-27 |
| Last modified | 2026-06-17 |
Affected (28)
| Vendor | Product |
|---|---|
| zyxel | uag2100 |
| zyxel | uag2100 firmware |
| zyxel | uag4100 |
| zyxel | uag4100 firmware |
| zyxel | uag5100 |
| zyxel | uag5100 firmware |
| zyxel | usg110 |
| zyxel | usg110 firmware |
| zyxel | usg1100 |
| zyxel | usg1100 firmware |
| zyxel | usg1900 |
| zyxel | usg1900 firmware |
| zyxel | usg210 |
| zyxel | usg210 firmware |
| zyxel | usg2200-vpn |
| zyxel | usg2200-vpn firmware |
| zyxel | usg310 |
| zyxel | usg310 firmware |
| zyxel | zywall 110 |
| zyxel | zywall 110 firmware |
| zyxel | zywall 1100 |
| zyxel | zywall 1100 firmware |
| zyxel | zywall 310 |
| zyxel | zywall 310 firmware |
| zyxel | zywall vpn100 |
| zyxel | zywall vpn100 firmware |
| zyxel | zywall vpn300 |
| zyxel | zywall vpn300 firmware |
References
- https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/
- 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/
- https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml
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