What is CVE-2018-11509?

CVE-2018-11509 is a critical-severity vulnerability in Asustor Data Master, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2018-08-16.

How severe is CVE-2018-11509?

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

Vulnerability in Asustor Data Master

CVE-2018-11509

ASUSTOR ADM 3.1.0.RFQ3 uses the same default root:admin username and password as it does for the NAS itself for applications that are installed from the online repository. This may allow an attacker to login and upload a webshell.

Published 2018-08-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.126 (96.1th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.126 · newest: 0.126 · change: 0.000

Affected products

Asustor Data Master — versions 3.1.0

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

www.exploit-db.com/exploits/45200/ (Exploit, VDB Entry, Third Party Advisory, exploit)
packetstormsecurity.com/files/148919/ASUSTOR-NAS-ADM-3.1.0-Remote-Command-Execu… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2018-11509?: CVE-2018-11509 is a critical-severity vulnerability in Asustor Data Master, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2018-08-16.
How severe is CVE-2018-11509?: Critical severity. CVSS v3 base score is 9.8 out of 10.