Stack-based Buffer Overflow in Pyramid Solutions NetStaX EtherNet/IP Stack
Priority MEDIUM 49CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00649 51st percentileScored 2026-11-07
Fix Fixed EtherNet/IP Adapter DLL Kit (EIPA) (Pyramid Solutions): v5.6.1EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE) (Pyramid Solutions): v5.6.1+6 more products
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Pyramid Solutions | EtherNet/IP Adapter DLL Kit (EIPA) | up to v5.6.1 | v5.6.1 | Patch available | CNA |
| Pyramid Solutions | EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE) | up to v5.6.1 | v5.6.1 | Patch available | CNA |
| Pyramid Solutions | EtherNet/IP Adapter Development Kit (EADK) | up to v5.6.1 | v5.6.1 | Patch available | CNA |
| Pyramid Solutions | EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE) | up to v5.6.1 | v5.6.1 | Patch available | CNA |
| Pyramid Solutions | EtherNet/IP Scanner DLL Kit (EIPS) | up to v5.6.1 | v5.6.1 | Patch available | CNA |
| Pyramid Solutions | EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE) | up to v5.6.1 | v5.6.1 | Patch available | CNA |
| Pyramid Solutions | EtherNet/IP Scanner Development Kit (ESDK) | up to v5.6.1 | v5.6.1 | Patch available | CNA |
| Pyramid Solutions | EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE) | before v5.6.1 | v5.6.1 | Patch available | CNA |
- EtherNet/IP Adapter DLL Kit (EIPA) VendorPyramid Solutions Affected up to v5.6.1 Fixed in v5.6.1 Patch available CNA
- EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE) VendorPyramid Solutions Affected up to v5.6.1 Fixed in v5.6.1 Patch available CNA
- EtherNet/IP Adapter Development Kit (EADK) VendorPyramid Solutions Affected up to v5.6.1 Fixed in v5.6.1 Patch available CNA
- EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE) VendorPyramid Solutions Affected up to v5.6.1 Fixed in v5.6.1 Patch available CNA
- EtherNet/IP Scanner DLL Kit (EIPS) VendorPyramid Solutions Affected up to v5.6.1 Fixed in v5.6.1 Patch available CNA
- EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE) VendorPyramid Solutions Affected up to v5.6.1 Fixed in v5.6.1 Patch available CNA
- EtherNet/IP Scanner Development Kit (ESDK) VendorPyramid Solutions Affected up to v5.6.1 Fixed in v5.6.1 Patch available CNA
- EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE) VendorPyramid Solutions Affected before v5.6.1 Fixed in v5.6.1 Patch available CNA
Remediation
- Fix · CNA EtherNet/IP Adapter DLL Kit (EIPA) (Pyramid Solutions) Fixed in v5.6.1
- Fix · CNA EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE) (Pyramid Solutions) Fixed in v5.6.1
- Fix · CNA EtherNet/IP Adapter Development Kit (EADK) (Pyramid Solutions) Fixed in v5.6.1
- Fix · CNA EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE) (Pyramid Solutions) Fixed in v5.6.1
- Fix · CNA EtherNet/IP Scanner DLL Kit (EIPS) (Pyramid Solutions) Fixed in v5.6.1
- Fix · CNA EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE) (Pyramid Solutions) Fixed in v5.6.1
- Fix · CNA EtherNet/IP Scanner Development Kit (ESDK) (Pyramid Solutions) Fixed in v5.6.1
- Fix · CNA EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE) (Pyramid Solutions) Fixed in v5.6.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-78012
- 2026-10-03 Alias added: GHSA-xw8p-j9mr-grph
- 2026-10-16 EPSS moved to the 50th–90th percentile
References
More Pyramid Solutions vulnerabilities
- TI-2022-01603 Pyramid Solutions EtherNet/IP Adapter Development Kit Out-of-bound Write CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-78012 · CVE Program
- CVE-2026-78012 · NVD
- FIRST EPSS
- GHSA-xw8p-j9mr-grph · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences