{"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":"<p>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.<br><a href=\"https://pyramidsolutions.com/my-account/\">https://pyramidsolutions.com/my-account/</a><br>For more information, see the Pyramid Solutions blog post \"NetStaX v5.6.1: Protecting Against Silent Buffer Overflow in Ethernet/IP Stack Explicit Messages\".<br><a href=\"https://pyramidsolutions.com/netstax-v-5-6-1-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/</a></p>"}]}],"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"}}]}}