What is CVE-2018-11189?

CVE-2018-11189 is a high-severity vulnerability in Quest Disk Backup, classified under OS Command Injection. CVSS score: 8.8/10. Published 2018-06-02.

How severe is CVE-2018-11189?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Quest Disk Backup

CVE-2018-11189

Quest DR Series Disk Backup software version before 4.0.3.1 allows privilege escalation (issue 1 of 6).

Vulnerability class: Command Injection (OS Command Injection)

Published 2018-06-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.034 (88.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Quest Disk Backup

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

seclists.org/fulldisclosure/2018/May/71 (mailing-list, Mailing List, Third Party Advisory)
packetstormsecurity.com/files/148003/Quest-DR-Series-Disk-Backup-Software-4.0.3… (VDB Entry, Third Party Advisory)
www.coresecurity.com/advisories/quest-dr-series-disk-backup-multiple-vulnerabil… (Third Party Advisory)

Frequently asked questions

What is CVE-2018-11189?: CVE-2018-11189 is a high-severity vulnerability in Quest Disk Backup, classified under OS Command Injection. CVSS score: 8.8/10. Published 2018-06-02.
How severe is CVE-2018-11189?: High severity. CVSS v3 base score is 8.8 out of 10.