{"id":"CVE-2026-78012","aliases":["EUVD-2026-69384","GHSA-xw8p-j9mr-grph"],"status":"published","title":"Stack-based Buffer Overflow in Pyramid Solutions NetStaX EtherNet/IP Stack","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.","severity":{"version":"4.0","score":9.3,"vector":"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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00649,"percentile":0.51472,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-09-01T15:01:49Z","modified":"2026-09-08T15:28:33Z","products":[{"vendor":"pyramid solutions","product":"ethernet/ip adapter development kit (eadk)"},{"vendor":"pyramid solutions","product":"ethernet/ip adapter development kit with cip security (eadk-secure)"},{"vendor":"pyramid solutions","product":"ethernet/ip adapter dll kit (eipa)"},{"vendor":"pyramid solutions","product":"ethernet/ip adapter dll kit with cip security (eipa-secure)"},{"vendor":"pyramid solutions","product":"ethernet/ip scanner development kit (esdk)"},{"vendor":"pyramid solutions","product":"ethernet/ip scanner development kit with cip security (esdk-secure)"},{"vendor":"pyramid solutions","product":"ethernet/ip scanner dll kit (eips)"},{"vendor":"pyramid solutions","product":"ethernet/ip scanner dll kit with cip security (eips-secure)"}],"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"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78012"},{"url":"https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages"},{"url":"https://github.com/advisories/GHSA-xw8p-j9mr-grph"}],"sources":{"cve":[{"id":"CVE-2026-78012","title":"Stack-based Buffer Overflow in Pyramid Solutions NetStaX EtherNet/IP Stack","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.","status":"published","published":"2026-09-01T15:01:49.064Z","modified":"2026-09-04T21:05:12.277Z","cvss":[{"version":"4.0","score":9.3,"vector":"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","level":"critical","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T13:34:59.78118Z"}],"euvd":[{"id":"EUVD-2026-69384","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.","status":"published","published":"2026-09-01T15:01:49Z","modified":"2026-09-04T21:05:12Z","cvss":[{"version":"4.0","score":9.3,"vector":"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","level":"critical"}],"updated_at":"2026-11-02T18:01:11.238356Z"}],"ghsa":[{"id":"GHSA-xw8p-j9mr-grph","title":"An issue in the NetStaX EtherNet/IP Stack prior to v5.6.1 could allow a large Class 3 explicit...","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.","status":"published","published":"2026-09-01T15:31:14Z","modified":"2026-09-05T00:32:06Z","cvss":[{"version":"4.0","score":9.3,"vector":"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","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:11:24.326884Z"}],"nvd":[{"id":"CVE-2026-78012","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.","status":"published","published":"2026-09-01T15:17:28.013Z","modified":"2026-09-08T15:28:33.09Z","cvss":[{"version":"4.0","score":9.3,"vector":"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","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:12:43.04945Z"}]}}