---
id: CVE-2026-75349
title: >-
  EIPStackGroup OpENer v2.3.0/master up to commit 76b95cf contains an
  out-of-bounds read vulnerability in Connection Manager request parsing
summary: >-
  EIPStackGroup OpENer v2.3.0/master up to commit 76b95cf contains an
  out-of-bounds read vulnerability in Connection Manager request parsing. 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'
cwe:
  - CWE-400
vendor: Red Hat
published: '2026-10-09'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T02:16:59.960'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75349'
references:
  - url: 'https://github.com/EIPStackGroup/OpENer'
    label: cve@mitre.org
  - url: >-
      https://github.com/EIPStackGroup/OpENer/blob/76b95cf/source/src/cip/cipconnectionmanager.c
    label: cve@mitre.org
  - url: >-
      https://github.com/EIPStackGroup/OpENer/blob/76b95cf/source/src/cip/cipmessagerouter.c
    label: cve@mitre.org
  - url: >-
      https://github.com/EIPStackGroup/OpENer/blob/76b95cf/source/src/enet_encap/cpf.c
    label: cve@mitre.org
  - url: >-
      https://github.com/EIPStackGroup/OpENer/blob/76b95cf/source/src/enet_encap/encap.c
    label: cve@mitre.org
  - url: 'https://github.com/EIPStackGroup/OpENer/issues/577'
    label: cve@mitre.org
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-75349.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-75349'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-75349'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00453
epssPercentile: 0.39167
ingestedAt: '2026-10-09T17:04:42.812Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-14T01:37:21.838358Z'
---

## Overview

EIPStackGroup OpENer v2.3.0/master up to commit 76b95cf contains an out-of-bounds read vulnerability in Connection Manager request parsing. 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.

## Vendor advisories

- **Red Hat VEX** · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-75349.json)