---
title: "CVE-2026-75350: EIPStackGroup OpENer - Buffer Overflow"
description: "EIPStackGroup OpENer v2.3 / master commit 76b95cf contains a buffer overflow caused by improper handling in GetAttributeList() for EtherNet/IP Get_Attribute_List service, letting remote attackers cause denial of service, exploit requires crafted network request."
url: https://panop.io/threat-heartbeat/CVE-2026-75350/
---

# CVE-2026-75350 EIPStackGroup OpENer - Buffer Overflow

EIPStackGroup OpENer v2.3 / master commit 76b95cf contains a buffer overflow caused by improper handling in GetAttributeList() for EtherNet/IP Get\_Attribute\_List service, letting remote attackers cause denial of service, exploit requires crafted network request.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.48% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-75350)

## Details

Type

Buffer Overflow

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

9 October 2026

Updated

15 October 2026

Weakness

[CWE-400](https://cwe.mitre.org/data/definitions/400.html)

## Vendor fix

Update to the latest version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-75350](https://nvd.nist.gov/vuln/detail/CVE-2026-75350)
- [https://github.com/EIPStackGroup/OpENer](https://github.com/EIPStackGroup/OpENer)
- [https://github.com/EIPStackGroup/OpENer/blob/master/source/src/cip/cipcommon.c](https://github.com/EIPStackGroup/OpENer/blob/master/source/src/cip/cipcommon.c)
- [https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet\_encap/cpf.c](https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/cpf.c)
- [https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet\_encap/endianconv.c](https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/endianconv.c)
- [https://github.com/EIPStackGroup/OpENer/issues/576](https://github.com/EIPStackGroup/OpENer/issues/576)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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