CVE-2026-78012
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Pyramid Solutions | EtherNet/IP Adapter DLL Kit (EIPA) | 0 <= v5.6.1 | affected |
| Pyramid Solutions | EtherNet/IP Adapter DLL Kit (EIPA) | v5.6.1 | unaffected |
| Pyramid Solutions | EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE) | 0 <= v5.6.1 | affected |
| Pyramid Solutions | EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE) | v5.6.1 | unaffected |
| Pyramid Solutions | EtherNet/IP Adapter Development Kit (EADK) | 0 <= v5.6.1 | affected |
| Pyramid Solutions | EtherNet/IP Adapter Development Kit (EADK) | v5.6.1 | unaffected |
| Pyramid Solutions | EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE) | 0 <= v5.6.1 | affected |
| Pyramid Solutions | EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE) | v5.6.1 | unaffected |
| Pyramid Solutions | EtherNet/IP Scanner DLL Kit (EIPS) | 0 <= v5.6.1 | affected |
| Pyramid Solutions | EtherNet/IP Scanner DLL Kit (EIPS) | v5.6.1 | unaffected |
| Pyramid Solutions | EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE) | 0 <= v5.6.1 | affected |
| Pyramid Solutions | EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE) | v5.6.1 | unaffected |
| Pyramid Solutions | EtherNet/IP Scanner Development Kit (ESDK) | 0 <= v5.6.1 | affected |
| Pyramid Solutions | EtherNet/IP Scanner Development Kit (ESDK) | v5.6.1 | unaffected |
| Pyramid Solutions | EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE) | 0 < v5.6.1 | affected |
| Pyramid Solutions | EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE) | v5.6.1 | unaffected |
Weaknesses
- CWE-121: CWE-121
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: total
References
- https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages/
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-246-07
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-246-07.json
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