CVE-2019-25686: Coreftp Core FTP

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Coreftp Core FTP: version 2.0 only

Published 2026-04-05. Last modified 2026-07-24.