---
id: CVE-2026-75125
title: >-
  PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains an authenticated
  null pointer dereference vulnerability in /cgi-bin/dispatcher.cgi
summary: >-
  PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains an authenticated
  null pointer dereference vulnerability in /cgi-bin/dispatcher.cgi. The
  web_poe_alive_rmtip_post handler dereferences the rmtIP parameter without
  verifying its…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
published: '2026-08-28'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:20:22.260'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75125'
references:
  - url: 'https://www.planet.com.tw/en/support/security-advisory/10'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/planet-gs-4210-16p2s-null-pointer-dereference-dos-via-dispatcher-cgi-web-poe-alive-rmtip-post
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00556
epssPercentile: 0.4403
ingestedAt: '2026-09-08T21:11:12.287Z'
---

## Overview

PLANET GS-4210-16P2S V3 firmware before 3.441b260626 contains an authenticated null pointer dereference vulnerability in /cgi-bin/dispatcher.cgi. The web_poe_alive_rmtip_post handler dereferences the rmtIP parameter without verifying its presence. A remote authenticated attacker can send a crafted request omitting the rmtIP parameter to cause the CGI process to dereference a null pointer and crash, resulting in denial of service of the web management interface.

## Remediation

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