---
id: CVE-2018-25230
title: Free IP Switcher 3.1 Denial of Service via Computer Name
summary: >-
  Free IP Switcher 3.1 contains a buffer overflow vulnerability that allows
  local attackers to crash the application by supplying an excessively long
  string in the Computer Name field. Attackers can paste a malicious payload
  into the Compu…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: Eusing
product: Free IP Switcher
affected:
  - free_ip_switcher 3.1
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-03-30T14:02:29.387326Z'
exploitAvailable: true
published: '2026-03-30'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T15:19:10.535Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2018-25230'
references:
  - url: 'https://www.exploit-db.com/exploits/46382'
    label: ExploitDB-46382
  - url: 'http://www.eusing.com/index.html'
    label: Official Product Homepage
  - url: 'http://www.eusing.com/ipscan/free_ip_scanner.htm'
    label: Product Reference
  - url: >-
      https://www.vulncheck.com/advisories/free-ip-switcher-denial-of-service-via-computer-name
    label: >-
      VulnCheck Advisory: Free IP Switcher 3.1 Denial of Service via Computer
      Name
tags:
  - cve.org
  - exploit-available
epss: 0.00287
epssPercentile: 0.1917
ingestedAt: '2026-10-01T15:48:17.888Z'
---

## Overview

Free IP Switcher 3.1 contains a buffer overflow vulnerability that allows local attackers to crash the application by supplying an excessively long string in the Computer Name field. Attackers can paste a malicious payload into the Computer Name input field and click Activate to trigger a denial of service condition that crashes the application.

## Affected

- `free_ip_switcher 3.1`

## Remediation

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