---
id: CVE-2026-75347
title: >-
  EIPStackGroup OpENer v2.3 and master up to commit 76b95cf contain an expired
  pointer dereference vulnerability in the EtherNet/IP Common Packet Format
  (CPF) handling logic
summary: >-
  EIPStackGroup OpENer v2.3 and master up to commit 76b95cf contain an expired
  pointer dereference vulnerability in the EtherNet/IP Common Packet Format
  (CPF) handling logic. This allows a remote attacker to cause a denial of
  service.
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'
published: '2026-10-09'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T17:41:47.060'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75347'
references:
  - url: >-
      https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/cpf.c
    label: cve@mitre.org
  - url: >-
      https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/encap.c
    label: cve@mitre.org
  - url: >-
      https://github.com/EIPStackGroup/OpENer/blob/master/source/src/ports/generic_networkhandler.c
    label: cve@mitre.org
  - url: 'https://github.com/EIPStackGroup/OpENer/issues/575'
    label: cve@mitre.org
tags:
  - nvd
ingestedAt: '2026-10-09T18:07:39.419Z'
---

## Overview

EIPStackGroup OpENer v2.3 and master up to commit 76b95cf contain an expired pointer dereference vulnerability in the EtherNet/IP Common Packet Format (CPF) handling logic. This allows a remote attacker to cause a denial of service.

## Remediation

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