Is CVE-2019-25686 actively exploited?

No active exploitation of CVE-2019-25686 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-25686 be exploited remotely?

Yes. CVE-2019-25686 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-25686?

CVE-2019-25686 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2019-25686

HIGH

CVE-2019-25686

CWE-306Published: April 5, 2026· Updated: Apr 9, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.2th

Official 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.

NVD Source

Technical Analysis

CVE-2019-25686 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.