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Pyramid Solutions NetStaX EtherNet/IP Stack

CRITICAL
CVSS 9.8
Date 2026-09-03T06:00:00+00:00
Source cisa-csaf
Published by CISA

// Description

Successful exploitation of this vulnerability could result in memory corruption, a device crash, or a potential remote attack vector without the originating device receiving a CIP error indicating that the request could not be processed.

// Vulnerabilities (1)

CVE ID CVSS Score Severity Description
CVE-2026-78012 9.8 critical
An issue in the NetStaX EtherNet/IP Stack prior to v5.6.1 could allow a large Class 3 explicit-message request to exceed the application-side receive buffer without generating an error or warning. The result could be memory corruption, a device crash, or a potential remote attack vector without the originating device receiving a CIP error indicating that the request could not be processed.

// Remediations (2)

Mitigation: NetStaX v5.6.1 addresses this issue with multiple layers of protection, including a compile-time ass
NetStaX v5.6.1 addresses this issue with multiple layers of protection, including a compile-time assertion, a runtime payload-size check, and clearer documentation of the relationships between packet and buffer-size constants.
Mitigation: For more information, see the Pyramid Solutions blog post "NetStaX v5.6.1: Protecting Against Silent
For more information, see the Pyramid Solutions blog post "NetStaX v5.6.1: Protecting Against Silent Buffer Overflow in Ethernet/IP Stack Explicit Messages".

// References