{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2023-38744",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-38744",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2023-08-03T04:55:52.423Z",
    "updatedAt": "2024-10-17T15:17:34.756Z",
    "importedAt": "2026-10-24T01:56:58.683Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": null,
      "summary": "Denial-of-service (DoS) vulnerability due to improper validation of specified type of input issue exists in the built-in EtherNet/IP port of the CJ Series CJ2 CPU unit and the communication function of the CS/CJ Series EtherNet/IP unit. If an affected product receives a packet which is specially crafted by a remote unauthenticated attacker, the unit of the affected product may fall into a denial-of-service (DoS) condition. Affected products/versions are as follows: CJ2M CPU Unit CJ2M-CPU3[] Unit version of the built-in EtherNet/IP section Ver. 2.18 and earlier, CJ2H CPU Unit CJ2H-CPU6[]-EIP Unit version of the built-in EtherNet/IP section Ver. 3.04 and earlier, CS/CJ Series EtherNet/IP Unit CS1W-EIP21 V3.04 and earlier, and CS/CJ Series EtherNet/IP Unit CJ1W-EIP21 V3.04 and earlier.",
      "affected": [
        {
          "vendor": "OMRON Corporation",
          "product": "CJ2M CPU Unit",
          "versions": [
            {
              "version": "CJ2M-CPU3[] Unit version of the built-in EtherNet/IP section Ver. 2.18 and earlier",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "OMRON Corporation",
          "product": "CJ2H CPU Unit",
          "versions": [
            {
              "version": "CJ2H-CPU6[]-EIP Unit version of the built-in EtherNet/IP section Ver. 3.04 and earlier",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "OMRON Corporation",
          "product": "CS/CJ Series EtherNet/IP Unit",
          "versions": [
            {
              "version": "CS1W-EIP21 V3.04 and earlier",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "OMRON Corporation",
          "product": "CS/CJ Series EtherNet/IP Unit",
          "versions": [
            {
              "version": "CJ1W-EIP21 V3.04 and earlier",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}