Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-24
- https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-ov
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-246-07
FAQ
What is CVE-2026-78012?
CVE-2026-78012 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2026-78012?
CVE-2026-78012 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-78012?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.