HIGH

CVE-2017-18594

CVSS v3

7.5

HIGH

EPSS Score

3.2 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2017-18594 Red Hat Product Security
nmap: denial of service condition due to a double free when SSH connection fails

Full record on NVD

Description

nse_libssh2.cc in Nmap 7.70 is subject to a denial of service condition due to a double free when an SSH connection fails, as demonstrated by a leading \\n character to ssh-brute.nse or ssh-auth-methods.nse.

Technical details

Published: 2019-08-29

Frequently asked questions

What is CVE-2017-18594?

Is CVE-2017-18594 actively exploited?

Active exploitation of CVE-2017-18594 has not been confirmed. Its EPSS score was 3.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-18594?

CVE-2017-18594 has a CVSS v3 base score of 7.5 (HIGH severity).

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