Vulnerability-Lookup

GHSA-XW8P-J9MR-GRPH

Vulnerability from github – Published: 2026-09-01 15:31 – Updated: 2026-09-05 00:31

Details

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

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.3 (Critical)


                  
                    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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-78012"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-01T15:17:28Z",
    "severity": "CRITICAL"
  },
  "details": "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": "GHSA-xw8p-j9mr-grph",
  "modified": "2026-09-05T00:31:05Z",
  "published": "2026-09-01T15:31:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78012"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-246-07.json"
    },
    {
      "type": "WEB",
      "url": "https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-246-07"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-78012 (GCVE-0-2026-78012)

Vulnerability from cvelistv5 – Published: 2026-09-01 15:01 – Updated: 2026-09-04 21:05

Title

Stack-based Buffer Overflow in Pyramid Solutions NetStaX EtherNet/IP Stack

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.3 (Critical)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 15:26 UTC

CWE

CWE-121

Assigner

icscert icscert root

References

3 references

URL	Tags
https://pyramidsolutions.com/netstax-v-5-6-1-prot…
https://www.cisa.gov/news-events/ics-advisories/i…
https://github.com/cisagov/CSAF/blob/develop/csaf…

Impacted products

8 products

Vendor	Product	Version
Pyramid Solutions	EtherNet/IP Adapter DLL Kit (EIPA)	Affected: 0 , ≤ v5.6.1 (custom) Unaffected: v5.6.1
Pyramid Solutions	EtherNet/IP Adapter DLL Kit with CIP Security (EIPA-SECURE)	Affected: 0 , ≤ v5.6.1 (custom) Unaffected: v5.6.1
Pyramid Solutions	EtherNet/IP Adapter Development Kit (EADK)	Affected: 0 , ≤ v5.6.1 (custom) Unaffected: v5.6.1
Pyramid Solutions	EtherNet/IP Adapter Development Kit with CIP Security (EADK-SECURE)	Affected: 0 , ≤ v5.6.1 (custom) Unaffected: v5.6.1
Pyramid Solutions	EtherNet/IP Scanner DLL Kit (EIPS)	Affected: 0 , ≤ v5.6.1 (custom) Unaffected: v5.6.1
Pyramid Solutions	EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE)	Affected: 0 , ≤ v5.6.1 (custom) Unaffected: v5.6.1
Pyramid Solutions	EtherNet/IP Scanner Development Kit (ESDK)	Affected: 0 , ≤ v5.6.1 (custom) Unaffected: v5.6.1
Pyramid Solutions	EtherNet/IP Scanner Development Kit with CIP Security (ESDK-SECURE)	Affected: 0 , < v5.6.1 (custom) Unaffected: v5.6.1

Credits

Pyramid Solutions reported this vulnerability to CISA.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-78012",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-01T15:26:46.553511Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-01T15:43:30.780Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
    ],
    "cna": {
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          "product": "EtherNet/IP Adapter DLL Kit (EIPA)",
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              "version": "0",
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            },
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        },
        {
          "defaultStatus": "unaffected",
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              "status": "affected",
              "version": "0",
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            },
            {
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            }
          ]
        },
        {
          "defaultStatus": "unaffected",
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              "status": "affected",
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            }
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        },
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          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Scanner DLL Kit (EIPS)",
          "vendor": "Pyramid Solutions",
          "versions": [
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              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
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              "version": "v5.6.1"
            }
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        },
        {
          "defaultStatus": "unaffected",
          "product": "EtherNet/IP Scanner DLL Kit with CIP Security (EIPS-SECURE)",
          "vendor": "Pyramid Solutions",
          "versions": [
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              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
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            },
            {
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          ]
        },
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          "product": "EtherNet/IP Scanner Development Kit (ESDK)",
          "vendor": "Pyramid Solutions",
          "versions": [
            {
              "lessThanOrEqual": "v5.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
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        },
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              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "v5.6.1"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Pyramid Solutions reported this vulnerability to CISA."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "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."
            }
          ],
          "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
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            "scope": "UNCHANGED",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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            {
              "lang": "en",
              "value": "GENERAL"
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        },
        {
          "cvssV4_0": {
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
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      "providerMetadata": {
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          "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-246-07"
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              "value": "\u003cp\u003eNetStaX 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.\u003cbr\u003e\u003ca href=\"https://pyramidsolutions.com/my-account/\"\u003ehttps://pyramidsolutions.com/my-account/\u003c/a\u003e\u003cbr\u003eFor more information, see the Pyramid Solutions blog post \"NetStaX v5.6.1: Protecting Against Silent Buffer Overflow in Ethernet/IP Stack Explicit Messages\".\u003cbr\u003e\u003ca href=\"https://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages/\"\u003ehttps://pyramidsolutions.com/netstax-v-5-6-1-protecting-against-silent-buffer-overflow-in-ethernet-ip-stack-explicit-messages/\u003c/a\u003e\u003c/p\u003e"
            }
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          "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/"
        }
      ],
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    "assignerShortName": "icscert",
    "cveId": "CVE-2026-78012",
    "datePublished": "2026-09-01T15:01:49.064Z",
    "dateReserved": "2026-08-21T22:15:28.774Z",
    "dateUpdated": "2026-09-04T21:05:12.277Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-XW8P-J9MR-GRPH

CVE-2026-78012 (GCVE-0-2026-78012)

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