{"id":"CVE-2025-3947","aliases":["EUVD-2025-21065","GHSA-96x3-56x6-r6f5"],"status":"published","title":"Integer underflow during processing of short network packets in CDA FTEB responder","description":"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.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00367,"percentile":0.30813,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-191"],"published":"2025-07-10T20:19:13Z","modified":"2026-06-17T09:20:58Z","products":[{"vendor":"honeywell","product":"c200e"},{"vendor":"honeywell","product":"c300 pcnt02"},{"vendor":"honeywell","product":"c300 pcnt05"},{"vendor":"honeywell","product":"c300pm"},{"vendor":"honeywell","product":"cn100"},{"vendor":"honeywell","product":"fim4"},{"vendor":"honeywell","product":"fim8"},{"vendor":"honeywell","product":"hca"},{"vendor":"honeywell","product":"uoc"}],"references":[{"url":"https://process.honeywell.com/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-3947"},{"url":"https://process.honeywell.com"},{"url":"https://github.com/advisories/GHSA-96x3-56x6-r6f5"}],"sources":{"cve":[{"id":"CVE-2025-3947","title":"Integer underflow during processing of short network packets in CDA FTEB responder","description":"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.","status":"published","published":"2025-07-10T20:19:13.991Z","modified":"2025-08-04T19:46:31.982Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:32:39.378527Z"}],"euvd":[{"id":"EUVD-2025-21065","description":"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.","status":"published","published":"2025-07-10T20:19:13Z","modified":"2025-08-04T19:46:31Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"updated_at":"2026-11-02T20:32:01.599514Z"}],"ghsa":[{"id":"GHSA-96x3-56x6-r6f5","title":"The Honeywell Experion PKS contains an Integer Underflow \n\nvulnerability \n\nin the component...","description":"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.","status":"published","published":"2025-07-10T21:31:54Z","modified":"2025-07-10T21:32:00Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T15:02:59.345355Z"}],"nvd":[{"id":"CVE-2025-3947","description":"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.","status":"published","published":"2025-07-10T21:15:28.547Z","modified":"2026-06-17T09:20:58.753Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:11:18.285862Z"}]}}