---
id: CVE-2020-37155
title: Core FTP Lite 1.3 - Denial of Service (PoC)
summary: >-
  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 …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-120
vendor: Core FTP
product: Core FTP Lite
affected:
  - lite 1.3c Build 1437
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-02-17T16:57:41.691296Z'
exploitAvailable: true
published: '2026-02-06'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T15:19:34.418Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2020-37155'
references:
  - url: 'https://www.exploit-db.com/exploits/48100'
    label: ExploitDB-48100
  - url: 'http://www.coreftp.com/'
    label: Core FTP Official Homepage
  - url: 'https://www.vulncheck.com/advisories/core-ftp-lite-denial-of-service-poc'
    label: 'VulnCheck Advisory: Core FTP Lite 1.3 - Denial of Service (PoC)'
tags:
  - cve.org
  - exploit-available
epss: 0.00412
epssPercentile: 0.3301
ingestedAt: '2026-10-01T15:48:17.876Z'
---

## Overview

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.

## Affected

- `lite 1.3c Build 1437`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.