What is CVE-2019-25686?

CVE-2019-25686 is a high-severity vulnerability in Coreftp Core Ftp, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-04-05.

How severe is CVE-2019-25686?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Coreftp Core Ftp

CVE-2019-25686

Core FTP 2.0 build 653 contains a denial of service vulnerability in the PBSZ command that allows unauthenticated attackers to crash the service by sending a malformed command with an oversized buffer. Attackers can send a PBSZ command wit…

Vulnerability class: Broken Authentication

EPSS: 0.002 (47.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Coreftp Core Ftp — versions 2.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

ExploitDB-46532 (exploit)
Official Product Homepage (product)
Product Reference (product)
VulnCheck Advisory: Core FTP 2.0 build 653 PBSZ Unauthenticated Denial of Service (third-party-advisory)

Frequently asked questions

What is CVE-2019-25686?: CVE-2019-25686 is a high-severity vulnerability in Coreftp Core Ftp, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-04-05.
How severe is CVE-2019-25686?: High severity. CVSS v3 base score is 7.5 out of 10.