What is CVE-2018-6384?

CVE-2018-6384 is a high-severity vulnerability in Nsclient Nsclient\+\+, classified under Unquoted Search Path or Element. CVSS score: 7.8/10. Published 2018-01-31.

How severe is CVE-2018-6384?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Nsclient Nsclient\+\+

CVE-2018-6384

Unquoted Windows search path vulnerability in NSClient++ before 0.4.1.73 allows non-privileged local users to execute arbitrary code with elevated privileges on the system via a malicious program.exe executable in the %SYSTEMDRIVE% folder.

Published 2018-01-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.9% 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

Nsclient Nsclient\+\+

Weakness classification (CWE)

CWE-428 — Unquoted Search Path or Element

References

www.on-x.com/sites/default/files/on-x_-_security_advisory_-_nsclient_-_cve-2018… (Exploit, Third Party Advisory)
nsclient.org/blog/2018/01/30/CVE-2018-6384-0.3.9/ (Vendor Advisory)

Frequently asked questions

What is CVE-2018-6384?: CVE-2018-6384 is a high-severity vulnerability in Nsclient Nsclient\+\+, classified under Unquoted Search Path or Element. CVSS score: 7.8/10. Published 2018-01-31.
How severe is CVE-2018-6384?: High severity. CVSS v3 base score is 7.8 out of 10.