CVE-2026-78012
Stack-based Buffer Overflow in Pyramid Solutions NetStaX EtherNet/IP Stack
- Published
- Updated
- Reserved
- Assigned by
- icscert
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.
Timeline
ID reserved
By icscert
- 11 days later
· 11 days later
Published
- 3 days later
· 3 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| icscertCNA (assigner) | 4.0 | Critical9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| icscertCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 4.0 | Critical9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.65% · top 49% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.3.
Weakness
Affected products
Pyramid Solutions · EtherNet/IP Adapter DLL Kit (EIPA)
- affected ≤ v5.6.1
- unaffected v5.6.1
Pyramid Solutions · EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE)
- affected ≤ v5.6.1
- unaffected v5.6.1
Pyramid Solutions · EtherNet/IP Adapter Development Kit (EADK)
- affected ≤ v5.6.1
- unaffected v5.6.1
Pyramid Solutions · EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE)
- affected ≤ v5.6.1
- unaffected v5.6.1
Pyramid Solutions · EtherNet/IP Scanner DLL Kit (EIPS)
- affected ≤ v5.6.1
- unaffected v5.6.1
Pyramid Solutions · EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE)
- affected ≤ v5.6.1
- unaffected v5.6.1
Pyramid Solutions · EtherNet/IP Scanner Development Kit (ESDK)
- affected ≤ v5.6.1
- unaffected v5.6.1
Pyramid Solutions · EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE)
- affected < v5.6.1
- unaffected v5.6.1
What to do
Solution: NetStaX v5.6.1 addresses this issue with multiple layers of protection, including a compile-time assertion, a runtime payload-size check, and clearer documentation of the relationships between packet and buffer-size constants. https://pyramidsolutions.com/my-account/ For more information, see the Pyramid Solutions blog post "NetStaX v5.6.1: Protecting Against Silent Buffer Overflow in Ethernet/IP Stack Explicit Messages". https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages/
References (3)
- https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages/ (opens in a new tab)
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-246-07 (opens in a new tab)
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-246-07.json (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-78012)Record last updated .