HIGH

CVE-2019-18217

Q: What is CVE-2019-18217?

ProFTPD before 1.3.6b and 1.3.7rc before 1.3.7rc2 allows remote unauthenticated denial-of-service due to incorrect handling of overly long commands because main.c in a child process enters an infinite loop.

Q: Is CVE-2019-18217 actively exploited?

Active exploitation of CVE-2019-18217 has not been confirmed. Its EPSS score was 20.3% on 2026-10-18, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-18217?

CVE-2019-18217 has a CVSS v3 base score of 7.5 (HIGH severity).

CVSS v3

7.5

HIGH

EPSS Score

20.3 %

exploit probability, as of 2026-10-18

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-2019-18217 Red Hat Product Security
proftpd: denial of service due to incorrect handling of long command
ICSA-20-042-03 CISA1 known affected
Siemens SIMATIC CP 1543-1
Siemens SIMATIC CP 1543-1 (incl. SIPLUS NET variants): All Versions >= V2.0 and < V2.2

Full record on NVD

Description

ProFTPD before 1.3.6b and 1.3.7rc before 1.3.7rc2 allows remote unauthenticated denial-of-service due to incorrect handling of overly long commands because main.c in a child process enters an infinite loop.

Technical details

Published: 2019-10-21

Frequently asked questions

What is CVE-2019-18217?

Is CVE-2019-18217 actively exploited?

Active exploitation of CVE-2019-18217 has not been confirmed. Its EPSS score was 20.3% on 2026-10-18, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-18217?

CVE-2019-18217 has a CVSS v3 base score of 7.5 (HIGH severity).

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