CVE-2026-78012: Pyramid Solutions Ethernet/ip Adapter Development Kit Eadk

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Pyramid Solutions Ethernet/ip Adapter Development Kit Eadk: up to and including v5.6.1
• Pyramid Solutions Ethernet/ip Adapter Development Kit With Cip Security Eadk-Secure: up to and including v5.6.1
• Pyramid Solutions Ethernet/ip Adapter Dll Kit Eipa: up to and including v5.6.1
• Pyramid Solutions Ethernet/ip Adapter Dll Kit With Cip Security Eipa-Secure: up to and including v5.6.1
• Pyramid Solutions Ethernet/ip Scanner Development Kit Esdk: up to and including v5.6.1
• Pyramid Solutions Ethernet/ip Scanner Development Kit With Cip Security Esdk-Secure: before v5.6.1 (fixed in v5.6.1)
• Pyramid Solutions Ethernet/ip Scanner Dll Kit Eips: up to and including v5.6.1
• Pyramid Solutions Ethernet/ip Scanner Dll Kit With Cip Security Eips-Secure: up to and including v5.6.1

Published 2026-09-01. Last modified 2026-09-08.