What is CVE-2019-15815?

CVE-2019-15815 is a medium-severity vulnerability in Zyxel 2.00\(abbx.3\), classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2019-11-12.

How severe is CVE-2019-15815?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Zyxel 2.00\(abbx.3\)

CVE-2019-15815

ZyXEL P-1302-T10D v3 devices with firmware version 2.00(ABBX.3) and earlier do not properly enforce access control and could allow an unauthorized user to access certain pages that require admin privileges.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2019-11-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.4th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Zyxel 2.00\(abbx.3\)
Zyxel P-1302-T10d — versions 3.0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

www.zyxel.com/support/P1302-T10D-v3-modem-insecure-direct-object-reference-vuln… (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2019-15815?: CVE-2019-15815 is a medium-severity vulnerability in Zyxel 2.00\(abbx.3\), classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2019-11-12.
How severe is CVE-2019-15815?: Medium severity. CVSS v3 base score is 6.5 out of 10.