HIGH

CVE-2023-22551

CVSS v3

7.5

HIGH

EPSS Score

1.5 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2023-22551 yet.

Full record on NVD

Description

The FTP (aka "Implementation of a simple FTP client and server") project through 96c1a35 allows remote attackers to cause a denial of service (memory consumption) by engaging in client activity, such as establishing and then terminating a connection. This occurs because malloc is used but free is not.

Technical details

Published: 2023-01-01

Frequently asked questions

What is CVE-2023-22551?

Is CVE-2023-22551 actively exploited?

Active exploitation of CVE-2023-22551 has not been confirmed. Its EPSS score was 1.5% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-22551?

CVE-2023-22551 has a CVSS v3 base score of 7.5 (HIGH severity).

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