Vulnerability-Lookup

GHSA-H42X-559X-Q66G

Vulnerability from github – Published: 2026-10-09 18:31 – Updated: 2026-10-09 18:31

Details

An out-of-bounds read vulnerability exists in EIPStackGroup OpENer v2.3 and master up to commit 76b95cf in the EtherNet/IP TCP SendRRData Common Packet Format parser. The issue occurs in CreateCommonPacketFormatStructure() when it parses recognized optional socket address information items of type 0x8000 or 0x8001 without first validating that the remaining CPF buffer contains the complete fixed sockaddr structure. This allows a remote attacker to cause a denial of service.

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-75348"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-09T16:17:29Z",
    "severity": "HIGH"
  },
  "details": "An out-of-bounds read vulnerability exists in EIPStackGroup OpENer v2.3 and master up to commit 76b95cf in the EtherNet/IP TCP SendRRData Common Packet Format parser. The issue occurs in CreateCommonPacketFormatStructure() when it parses recognized optional socket address information items of type 0x8000 or 0x8001 without first validating that the remaining CPF buffer contains the complete fixed sockaddr structure. This allows a remote attacker to cause a denial of service.",
  "id": "GHSA-h42x-559x-q66g",
  "modified": "2026-10-09T18:31:43Z",
  "published": "2026-10-09T18:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75348"
    },
    {
      "type": "WEB",
      "url": "https://github.com/EIPStackGroup/OpENer/issues/573"
    },
    {
      "type": "WEB",
      "url": "https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/cpf.c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/encap.c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/endianconv.c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-75348 (GCVE-0-2026-75348)

Vulnerability from cvelistv5 – Published: 2026-10-09 00:00 – Updated: 2026-10-09 17:52

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-09 16:56 UTC

CWE

n/a
CWE-125 - Out-of-bounds Read

Assigner

mitre CNA under the mitre root

CNA scorecard E 27/100 over 2350 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/EIPStackGroup/OpENer/blob/mast…
https://github.com/EIPStackGroup/OpENer/blob/mast…
https://github.com/EIPStackGroup/OpENer/blob/mast…
https://github.com/EIPStackGroup/OpENer/issues/573

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-75348",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-09T16:56:20.547425Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-09T17:52:24.681Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/EIPStackGroup/OpENer/issues/573"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An out-of-bounds read vulnerability exists in EIPStackGroup OpENer v2.3 and master up to commit 76b95cf in the EtherNet/IP TCP SendRRData Common Packet Format parser. The issue occurs in CreateCommonPacketFormatStructure() when it parses recognized optional socket address information items of type 0x8000 or 0x8001 without first validating that the remaining CPF buffer contains the complete fixed sockaddr structure. This allows a remote attacker to cause a denial of service."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N",
            "version": "3.1"
          }
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          "descriptions": [
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              "lang": "en",
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        "dateUpdated": "2026-10-09T16:01:13.463Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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      "references": [
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          "url": "https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/endianconv.c"
        },
        {
          "url": "https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/cpf.c"
        },
        {
          "url": "https://github.com/EIPStackGroup/OpENer/blob/master/source/src/enet_encap/encap.c"
        },
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          "url": "https://github.com/EIPStackGroup/OpENer/issues/573"
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    "datePublished": "2026-10-09T00:00:00.000Z",
    "dateReserved": "2026-08-17T00:00:00.000Z",
    "dateUpdated": "2026-10-09T17:52:24.681Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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.
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GHSA-H42X-559X-Q66G

CVE-2026-75348 (GCVE-0-2026-75348)

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