CVE-2026-51537

Published: Jul 13, 2026Updated: Aug 11, 2026 Sources: CVE List NVDCWE-125

9.1CRITICAL

NVD MITRE

Description

EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of ForwardOpen requests when processing short malformed packets. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser to continue reading fields even when request data is insufficient. This issue is remotely triggerable via network traffic and does not require authentication.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-125

Affected Products

opener project

oss-projectaka openerp

openerOn-prem

Enterprise Software / erp

and 1 more affected products View all →

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Collection

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References

https://gist.github.com/MrAlaskan/a5fb0fb7765c9df80d28220ed558f04e

gist.github.com

https://github.com/EIPStackGroup/OpENer/issues/564

github.com

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