CVE-2019-25686

8.7 highEPSS 0.5%

High (8.7) in coreftp core ftp. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.7 high

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

CVSS 3.1

7.5 high

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
CWE: CWE-306
Published: 2026-04-05
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

Affected

coreftp:core_ftp

References

http://coreftp.com/server/download/archive/CoreFTPServer653.exe
http://www.coreftp.com/
https://www.exploit-db.com/exploits/46532
https://www.vulncheck.com/advisories/core-ftp-build-653-pbsz-unauthenticated-denial-of-service

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