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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00012.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Core FTP Core FTP Lite affected
Version Status Constraints
1.3c Build 1437 affected —

No data.

No data.

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Vendors Products
Core Ftp Subscribe
Core Ftp Lite Subscribe

Project Subscriptions

Vendors Products
Core Ftp Subscribe
Core Ftp Lite Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
http://www.coreftp.com/ cve-icon cve-icon
https://www.exploit-db.com/exploits/48100 cve-icon cve-icon
https://www.vulncheck.com/advisories/core-ftp-lite-denial-of-service-poc cve-icon cve-icon
History

Tue, 17 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 10 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 09 Feb 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Core Ftp
Core Ftp core Ftp Lite
Vendors & Products Core Ftp
Core Ftp core Ftp Lite

Fri, 06 Feb 2026 23:30:00 +0000

Type Values Removed Values Added
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.
Title Core FTP Lite 1.3 - Denial of Service (PoC)
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.7, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-02-17T16:57:49.310Z

Reserved: 2026-02-03T16:27:45.310Z

Link: CVE-2020-37155

cve-icon Vulnrichment

Updated: 2026-02-10T20:33:53.130Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-07T00:15:55.600

Modified: 2026-02-09T16:08:55.263

Link: CVE-2020-37155

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-09T10:45:02Z

Weaknesses