Critical 9.8Published Sep 1, 2026

CVE-2026-78012Stack-based Buffer Overflow in Pyramid Solutions NetStaX EtherNet/IP Stack

Updated under an hour ago (Oct 27, 2026, 5:23 PM ET)

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It affects Pyramid Solutions EtherNet/IP Adapter DLL Kit (EIPA) and 7 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Pyramid Solutions EtherNet/IP Adapter DLL Kit (EIPA)

Exploited in the last 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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: icscert
NVD analysis: Awaiting Analysis
Record last updated: Sep 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Pyramid Solutions EtherNet/IP Adapter DLL Kit (EIPA) pyramid_solutions:ethernet_ip_adapter_dll_kit_eipa (from the name)	through v5.6.1; v5.6.1 not affected	CNA record
Pyramid Solutions EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE) pyramid_solutions:ethernet_ip_adapter_dll_kit_with_cip_security_eipa_secure (from the name)	through v5.6.1; v5.6.1 not affected	CNA record
Pyramid Solutions EtherNet/IP Adapter Development Kit (EADK) pyramid_solutions:ethernet_ip_adapter_development_kit_eadk (from the name)	through v5.6.1; v5.6.1 not affected	CNA record
Pyramid Solutions EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE) pyramid_solutions:ethernet_ip_adapter_development_kit_with_cip_security_eadk_secure (from the name)	through v5.6.1; v5.6.1 not affected	CNA record
Pyramid Solutions EtherNet/IP Scanner DLL Kit (EIPS) pyramid_solutions:ethernet_ip_scanner_dll_kit_eips (from the name)	through v5.6.1; v5.6.1 not affected	CNA record
Pyramid Solutions EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE) pyramid_solutions:ethernet_ip_scanner_dll_kit_with_cip_security_eips_secure (from the name)	through v5.6.1; v5.6.1 not affected	CNA record
Pyramid Solutions EtherNet/IP Scanner Development Kit (ESDK) pyramid_solutions:ethernet_ip_scanner_development_kit_esdk (from the name)	through v5.6.1; v5.6.1 not affected	CNA record
Pyramid Solutions EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE) pyramid_solutions:ethernet_ip_scanner_development_kit_with_cip_security_esdk_secure (from the name)	before v5.6.1; v5.6.1 not affected	CNA record

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.