CVE-2026-78012

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

VendorProductVersion RangeStatus
Pyramid SolutionsEtherNet/IP Adapter DLL Kit (EIPA)0 <= v5.6.1affected
Pyramid SolutionsEtherNet/IP Adapter DLL Kit (EIPA)v5.6.1unaffected
Pyramid SolutionsEtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE)0 <= v5.6.1affected
Pyramid SolutionsEtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE)v5.6.1unaffected
Pyramid SolutionsEtherNet/IP Adapter Development Kit (EADK)0 <= v5.6.1affected
Pyramid SolutionsEtherNet/IP Adapter Development Kit (EADK)v5.6.1unaffected
Pyramid SolutionsEtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE)0 <= v5.6.1affected
Pyramid SolutionsEtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE)v5.6.1unaffected
Pyramid SolutionsEtherNet/IP Scanner DLL Kit (EIPS)0 <= v5.6.1affected
Pyramid SolutionsEtherNet/IP Scanner DLL Kit (EIPS)v5.6.1unaffected
Pyramid SolutionsEtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE)0 <= v5.6.1affected
Pyramid SolutionsEtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE)v5.6.1unaffected
Pyramid SolutionsEtherNet/IP Scanner Development Kit (ESDK)0 <= v5.6.1affected
Pyramid SolutionsEtherNet/IP Scanner Development Kit (ESDK)v5.6.1unaffected
Pyramid SolutionsEtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE)0 < v5.6.1affected
Pyramid SolutionsEtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE)v5.6.1unaffected

Weaknesses

  • CWE-121: CWE-121

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: total

References