CVE-2019-25686

HIGH

Core FTP 2.0 build 653 PBSZ Unauthenticated Denial of Service

Title source: cna

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.

Exploits (1)

exploitdb WORKING POC

by Hodorsec · pythondoswindows

https://www.exploit-db.com/exploits/46532

View Code ZIP pw:eip

References (4)

[Exploit] https://www.exploit-db.com/exploits/46532

[Product] http://www.coreftp.com/

[Product] http://coreftp.com/server/download/archive/CoreFTPServer653.exe

[Third Party Advisory] https://www.vulncheck.com/advisories/core-ftp-build-653-pbsz-unauthenticated-denial-of-service

Scores

CVSS v3 7.5

EPSS 0.0016

EPSS Percentile 36.6%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-306

Status published

Products (2)

Coreftp/Core FTP 2.0

coreftp/core_ftp 2.0 build_653

Published Apr 05, 2026

Tracked Since Apr 06, 2026