CVE-2019-25686

high

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.

References

https://www.vulncheck.com/advisories/core-ftp-build-653-pbsz-unauthenticated-denial-of-service

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

http://www.coreftp.com/

http://coreftp.com/server/download/archive/CoreFTPServer653.exe

Details

Source: Mitre, NVD

Published: 2026-04-05

Updated: 2026-04-07

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High

CVSS v4

Base Score: 8.7

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00043