{
  "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-2025-2520",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-2520",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-07-10T19:54:35.250Z",
    "updatedAt": "2025-08-04T19:44:48.506Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "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": "Dereferencing of an uninitialized pointer leads to denial of service.",
      "summary": "The Honeywell Experion PKS contains an Uninitialized Variable in the common Epic Platform Analyzer (EPA) communications. An attacker could potentially exploit this vulnerability, leading to a Communication Channel Manipulation, which results in a dereferencing of an uninitialized pointer leading to a denial of service.\n\n\n\nHoneywell recommends updating to the most recent version of \n\nHoneywell Experion PKS: 520.2 TCU9 HF1and 530.1 TCU3 HF1. The affected Experion PKS products are \n\nC300 PCNT02, EHB, EHPM, ELMM, Classic ENIM, ETN, FIM4, FIM8, PGM, and RFIM.  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": "EHB",
          "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": "EHPM",
          "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": "ELMM",
          "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": "Classic ENIM",
          "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": "ETN",
          "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": "PGM",
          "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": "RFIM",
          "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"
            }
          ]
        }
      ]
    }
  }
}