{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-78012", "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "state": "PUBLISHED", "assignerShortName": "icscert", "dateReserved": "2026-08-21T22:15:28.774Z", "datePublished": "2026-09-01T15:01:49.064Z", "dateUpdated": "2026-09-04T21:05:12.277Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2026-09-04T21:05:12.277Z" }, "title": "Stack-based Buffer Overflow in Pyramid Solutions NetStaX EtherNet/IP Stack", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-121", "description": "CWE-121", "type": "CWE" } ] } ], "affected": [ { "vendor": "Pyramid Solutions", "product": "EtherNet/IP Adapter DLL Kit (EIPA)", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "v5.6.1", "versionType": "custom" }, { "status": "unaffected", "version": "v5.6.1" } ], "defaultStatus": "unaffected" }, { "vendor": "Pyramid Solutions", "product": "EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE)", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "v5.6.1", "versionType": "custom" }, { "status": "unaffected", "version": "v5.6.1" } ], "defaultStatus": "unaffected" }, { "vendor": "Pyramid Solutions", "product": "EtherNet/IP Adapter Development Kit (EADK)", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "v5.6.1", "versionType": "custom" }, { "status": "unaffected", "version": "v5.6.1" } ], "defaultStatus": "unaffected" }, { "vendor": "Pyramid Solutions", "product": "EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE)", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "v5.6.1", "versionType": "custom" }, { "status": "unaffected", "version": "v5.6.1" } ], "defaultStatus": "unaffected" }, { "vendor": "Pyramid Solutions", "product": "EtherNet/IP Scanner DLL Kit (EIPS)", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "v5.6.1", "versionType": "custom" }, { "status": "unaffected", "version": "v5.6.1" } ], "defaultStatus": "unaffected" }, { "vendor": "Pyramid Solutions", "product": "EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE)", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "v5.6.1", "versionType": "custom" }, { "status": "unaffected", "version": "v5.6.1" } ], "defaultStatus": "unaffected" }, { "vendor": "Pyramid Solutions", "product": "EtherNet/IP Scanner Development Kit (ESDK)", "versions": [ { "status": "affected", "version": "0", "lessThanOrEqual": "v5.6.1", "versionType": "custom" }, { "status": "unaffected", "version": "v5.6.1" } ], "defaultStatus": "unaffected" }, { "vendor": "Pyramid Solutions", "product": "EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE)", "versions": [ { "status": "affected", "version": "0", "lessThan": "v5.6.1", "versionType": "custom" }, { "status": "unaffected", "version": "v5.6.1" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "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.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "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." } ] } ], "references": [ { "url": "https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages/" }, { "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-246-07" }, { "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-246-07.json" } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "CRITICAL", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.3, "vectorString": "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" } } ], "solutions": [ { "lang": "en", "value": "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.\n https://pyramidsolutions.com/my-account/ \nFor more information, see the Pyramid Solutions blog post \"NetStaX v5.6.1: Protecting Against Silent Buffer Overflow in Ethernet/IP Stack Explicit Messages\".\n https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages/", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "

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/

" } ] } ], "credits": [ { "lang": "en", "value": "Pyramid Solutions reported this vulnerability to CISA.", "type": "finder" } ], "source": { "advisory": "ICSA-26-246-07", "discovery": "INTERNAL" }, "x_generator": { "engine": "Vulnogram 1.0.5" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-09-01T15:26:46.553511Z", "id": "CVE-2026-78012", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-01T15:43:30.780Z" } } ] } }