FKIE_CVE-2026-78012

Vulnerability from fkie_nvd - Published: 2026-09-01 15:17 - Updated: 2026-09-08 15:28
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
References
ics-cert@hq.dhs.govhttps://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-246-07.json
ics-cert@hq.dhs.govhttps://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages/
ics-cert@hq.dhs.govhttps://www.cisa.gov/news-events/ics-advisories/icsa-26-246-07
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Adapter DLL Kit (EIPA)",
          "vendor": "Pyramid Solutions",
          "versions": [
            {
              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "v5.6.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE)",
          "vendor": "Pyramid Solutions",
          "versions": [
            {
              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "v5.6.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Adapter Development Kit (EADK)",
          "vendor": "Pyramid Solutions",
          "versions": [
            {
              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "v5.6.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE)",
          "vendor": "Pyramid Solutions",
          "versions": [
            {
              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "v5.6.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Scanner DLL Kit (EIPS)",
          "vendor": "Pyramid Solutions",
          "versions": [
            {
              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "v5.6.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE)",
          "vendor": "Pyramid Solutions",
          "versions": [
            {
              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "v5.6.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Scanner Development Kit (ESDK)",
          "vendor": "Pyramid Solutions",
          "versions": [
            {
              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "v5.6.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE)",
          "vendor": "Pyramid Solutions",
          "versions": [
            {
              "lessThan": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "v5.6.1"
            }
          ]
        }
      ],
      "source": "ics-cert@hq.dhs.gov"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-78012",
  "lastModified": "2026-09-08T15:28:33.090",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "ics-cert@hq.dhs.gov",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "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/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "ics-cert@hq.dhs.gov",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-78012",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-01T15:26:46.553511Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-01T15:17:28.013",
  "references": [
    {
      "source": "ics-cert@hq.dhs.gov",
      "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-246-07.json"
    },
    {
      "source": "ics-cert@hq.dhs.gov",
      "url": "https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages/"
    },
    {
      "source": "ics-cert@hq.dhs.gov",
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-246-07"
    }
  ],
  "sourceIdentifier": "ics-cert@hq.dhs.gov",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ],
      "source": "ics-cert@hq.dhs.gov",
      "type": "Secondary"
    }
  ]
}



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