---
id: CVE-2019-25654
title: Core FTP/SFTP Server 1.2 Denial of Service via Buffer Overflow
summary: >-
  Core FTP/SFTP Server 1.2 contains a buffer overflow vulnerability that allows
  attackers to crash the service by supplying an excessively long string in the
  User domain field. Attackers can paste a malicious payload containing 7000
  bytes …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: Coreftp
product: Core FTP/SFTP Server
affected:
  - core_ftp_sftp_server v2-Build 673
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-03-30T12:46:37.450545Z'
exploitAvailable: true
published: '2026-03-30'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T00:54:09.249Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2019-25654'
references:
  - url: 'https://www.exploit-db.com/exploits/46371'
    label: ExploitDB-46371
  - url: 'http://www.coreftp.com/'
    label: Official Product Homepage
  - url: 'http://www.coreftp.com/server/download/archive/CoreFTPServer589.42.exe'
    label: Product Reference
  - url: >-
      https://www.vulncheck.com/advisories/core-ftp-sftp-server-denial-of-service-via-buffer-overflow
    label: >-
      VulnCheck Advisory: Core FTP/SFTP Server 1.2 Denial of Service via Buffer
      Overflow
tags:
  - cve.org
  - exploit-available
epss: 0.00703
epssPercentile: 0.53085
ingestedAt: '2026-10-27T16:11:59.191Z'
---

## Overview

Core FTP/SFTP Server 1.2 contains a buffer overflow vulnerability that allows attackers to crash the service by supplying an excessively long string in the User domain field. Attackers can paste a malicious payload containing 7000 bytes of data into the domain configuration to trigger an application crash and deny service.

## Affected

- `core_ftp_sftp_server v2-Build 673`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.