What is CVE-2020-15320?

CVE-2020-15320 is a critical-severity vulnerability in Zyxel Cloudcnm Secumanager, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2020-06-29.

How severe is CVE-2020-15320?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Zyxel Cloudcnm Secumanager

CVE-2020-15320

Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has the axiros password for the root account.

Published 2020-06-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (68.3th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Zyxel Cloudcnm Secumanager — versions 3.1.0, 3.1.1

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

pierrekim.github.io/blog/2020-03-09-zyxel-secumanager-0day-vulnerabilities.html (Technical Description, Exploit, Third Party Advisory)
www.zyxel.com/support/vulnerabilities-of-CloudCNM-SecuManager.shtml (Vendor Advisory)

Frequently asked questions

What is CVE-2020-15320?: CVE-2020-15320 is a critical-severity vulnerability in Zyxel Cloudcnm Secumanager, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2020-06-29.
How severe is CVE-2020-15320?: Critical severity. CVSS v3 base score is 9.8 out of 10.