CVE-2019-25686 - CVE House
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Status published High CVE-2019-25686

Core FTP 2.0 build 653 PBSZ Unauthenticated Denial of Service

Vulnerability Description

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 with a payload exceeding 211 bytes to trigger an access violation and crash the FTP server process.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Hodorsec (hodorsec@protonmail.com / hodor@hodorsec.com)

Affected Vendor

Affected Software

Core FTP
Vulnerable Versions:
2.0

Timeline

Official Publish: April 5th, 2026
Last Modified: April 6th, 2026
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)