Description
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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Pyramid Solutions | EtherNet/IP Adapter DLL Kit (EIPA) | ≤ v5.6.1 | v5.6.1 |
| Pyramid Solutions | EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE) | ≤ v5.6.1 | v5.6.1 |
| Pyramid Solutions | EtherNet/IP Adapter Development Kit (EADK) | ≤ v5.6.1 | v5.6.1 |
| Pyramid Solutions | EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE) | ≤ v5.6.1 | v5.6.1 |
| Pyramid Solutions | EtherNet/IP Scanner DLL Kit (EIPS) | ≤ v5.6.1 | v5.6.1 |
| Pyramid Solutions | EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE) | ≤ v5.6.1 | v5.6.1 |
| Pyramid Solutions | EtherNet/IP Scanner Development Kit (ESDK) | ≤ v5.6.1 | v5.6.1 |
| Pyramid Solutions | EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE) | < v5.6.1 | v5.6.1 |
Advisories 1
- ICSA-26-246-07 Pyramid Solutions NetStaX EtherNet/IP Stack CISA ICS & IT advisories · Sep 3, 2026