CVE-2019-25654

HIGH

Core FTP/SFTP Server 1.2 Denial of Service via Buffer Overflow

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-25654. PoCs published by Victor Mondragón.

AI-analyzed exploit summary This PoC exploits a buffer overflow vulnerability in Core FTP/SFTP Server 1.2 by writing a large string of 'A' characters to a file, which when pasted into the 'User domain' field causes a denial of service (DoS). The exploit is straightforward and demonstrates the vulnerability effectively.

Description

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.

Exploits (1)

exploitdb WORKING POC
by Victor Mondragón · pythondoswindows
https://www.exploit-db.com/exploits/46371

This PoC exploits a buffer overflow vulnerability in Core FTP/SFTP Server 1.2 by writing a large string of 'A' characters to a file, which when pasted into the 'User domain' field causes a denial of service (DoS). The exploit is straightforward and demonstrates the vulnerability effectively.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Core FTP/SFTP Server 1.2 - Build 589.42
No auth needed
Prerequisites: Python environment · Core FTP/SFTP Server installed and running
devstral-2 · analyzed Apr 08, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit exploit
ExploitDB-46371
https://www.exploit-db.com/exploits/46371
Product product
Official Product Homepage
http://www.coreftp.com/
Third Party Advisory third-party-advisory
VulnCheck Advisory: Core FTP/SFTP Server 1.2 Denial of Service via Buffer Overflow
https://www.vulncheck.com/advisories/core-ftp-sftp-server-denial-of-service-via-buffer-overflow

Scores

CVSS v3 7.5
EPSS 0.0069
EPSS Percentile 47.9%
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-787
Status published
Products (2)
Coreftp/Core FTP/SFTP Server v2-Build 673
coreftp/core_ftp 1.2
Published Mar 30, 2026
Tracked Since Mar 30, 2026