CVE-2019-25686

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
http://coreftp.com/server/download/archive/CoreFTPServer653.exe	Product
http://www.coreftp.com/	Product
https://www.exploit-db.com/exploits/46532	Exploit VDB Entry
https://www.vulncheck.com/advisories/core-ftp-build-653-pbsz-unauthenticated-denial-of-service	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:coreftp:core_ftp:2.0:build_653:*:*:*:*:*:*

History

09 Apr 2026, 19:03

Type	Values Removed	Values Added
First Time		Coreftp Coreftp core Ftp
CPE		cpe:2.3:a:coreftp:core_ftp:2.0:build_653::::::
References	~~() http://coreftp.com/server/download/archive/CoreFTPServer653.exe -~~	() http://coreftp.com/server/download/archive/CoreFTPServer653.exe - Product
References	~~() http://www.coreftp.com/ -~~	() http://www.coreftp.com/ - Product
References	~~() https://www.exploit-db.com/exploits/46532 -~~	() https://www.exploit-db.com/exploits/46532 - Exploit, VDB Entry
References	~~() https://www.vulncheck.com/advisories/core-ftp-build-653-pbsz-unauthenticated-denial-of-service -~~	() https://www.vulncheck.com/advisories/core-ftp-build-653-pbsz-unauthenticated-denial-of-service - Third Party Advisory

05 Apr 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-05 21:16

Updated : 2026-04-09 19:03

NVD link : CVE-2019-25686

Mitre link : CVE-2019-25686

CVE.ORG link : CVE-2019-25686

JSON object : View

Products Affected

coreftp

core_ftp

CWE

CWE-306

Missing Authentication for Critical Function

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