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Description

Core FTP Lite 1.3 contains a buffer overflow vulnerability in the username input field that allows attackers to crash the application by supplying oversized input. Attackers can generate a 7000-byte payload of repeated 'A' characters to trigger an application crash without requiring additional interaction.

PUBLISHED Reserved 2026-02-03 | Published 2026-02-06 | Updated 2026-02-17 | Assigner VulnCheck




MEDIUM: 6.7CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Product status

1.3c Build 1437
affected

Credits

Berat Isler finder

References

www.exploit-db.com/exploits/48100 (ExploitDB-48100) exploit

www.coreftp.com/ (Core FTP Official Homepage) product

www.vulncheck.com/...ies/core-ftp-lite-denial-of-service-poc (VulnCheck Advisory: Core FTP Lite 1.3 - Denial of Service (PoC)) third-party-advisory

cve.org (CVE-2020-37155)

nvd.nist.gov (CVE-2020-37155)

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