{
  "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-2025-3947",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-3947",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-07-10T20:19:13.991Z",
    "updatedAt": "2025-08-04T19:46:31.982Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "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": "Integer underflow during processing of short network packets in CDA FTEB responder",
      "summary": "The Honeywell Experion PKS contains an Integer Underflow \n\nvulnerability \n\nin the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to \n\nInput Data Manipulation, which could result in improper integer data value checking during subtraction leading to a denial of service.\n\n\n\nHoneywell recommends updating to the most recent version of Honeywell Experion PKS:520.2 TCU9 HF1 and 530.1 TCU3 HF1.\n\nThe affected Experion PKS products are C300 PCNT02, C300 PCNT05, FIM4, FIM8, UOC, CN100, HCA, C300PM, and C200E.  The Experion PKS versions affected are from 520.1 through 520.2 TCU9 and from 530 through 530 TCU3.",
      "affected": [
        {
          "vendor": "Honeywell",
          "product": "C300 PCNT02",
          "platforms": [
            "Experion PKS"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "520.1",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "520.2 TCU9"
            },
            {
              "version": "530",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "530 TCU3"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "C300 PCNT05",
          "platforms": [
            "Experion PKS"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "520.1",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "520.2 TCU9"
            },
            {
              "version": "530",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "530 TCU3"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "FIM4",
          "platforms": [
            "Experion PKS"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "520.1",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "520.2 TCU9"
            },
            {
              "version": "530",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "530 TCU3"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "FIM8",
          "platforms": [
            "Experion PKS"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "520.1",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "520.2 TCU9"
            },
            {
              "version": "530",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "530 TCU3"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "UOC",
          "platforms": [
            "Experion PKS"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "520.1",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "520.2 TCU9"
            },
            {
              "version": "530",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "530 TCU3"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "CN100",
          "platforms": [
            "Experion PKS"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "520.1",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "520.2 TCU9"
            },
            {
              "version": "530",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "530 TCU3"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "HCA",
          "platforms": [
            "Experion PKS"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "520.1",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "520.2 TCU9"
            },
            {
              "version": "530",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "530 TCU3"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "C300PM",
          "platforms": [
            "Experion PKS"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "520.1",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "520.2 TCU9"
            },
            {
              "version": "530",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "530 TCU3"
            }
          ]
        },
        {
          "vendor": "Honeywell",
          "product": "C200E",
          "platforms": [
            "Experion PKS"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "520.1",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "520.2 TCU9"
            },
            {
              "version": "530",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "530 TCU3"
            }
          ]
        }
      ]
    }
  }
}