{"id":"CVE-2026-101103","aliases":["EUVD-2026-105316","GHSA-cw79-5c2h-gpr4"],"status":"published","title":"HMS Networks PEAK-System PCAN Windows drivers Classic Buffer Overflow","description":"The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.","severity":{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00122,"percentile":0.02009,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2026-10-20T20:19:10Z","modified":"2026-10-29T19:17:14Z","products":[{"vendor":"hms networks","product":"pcan windows can device drivers"},{"vendor":"hms networks","product":"peak-system device driver setup"}],"references":[{"url":"https://www.hms-networks.com/cybersecurity"},{"url":"https://www.peak-system.com/support/downloads/software/"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-293-01"},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-293-01.json"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101103"},{"url":"https://www.peak-system.com/support/downloads/software"},{"url":"https://github.com/advisories/GHSA-cw79-5c2h-gpr4"}],"sources":{"cve":[{"id":"CVE-2026-101103","title":"HMS Networks PEAK-System PCAN Windows drivers Classic Buffer Overflow","description":"The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.","status":"published","published":"2026-10-20T20:19:10.646Z","modified":"2026-10-29T19:01:16.074Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:20:09.808851Z"}],"euvd":[{"id":"EUVD-2026-105316","description":"The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.","status":"published","published":"2026-10-20T20:19:10Z","modified":"2026-10-29T19:01:16Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:59:15.044173Z"}],"ghsa":[{"id":"GHSA-cw79-5c2h-gpr4","title":"The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was...","description":"The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.","status":"published","published":"2026-10-20T21:31:05Z","modified":"2026-10-20T21:31:06Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T15:14:04.750771Z"}],"nvd":[{"id":"CVE-2026-101103","description":"The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.","status":"published","published":"2026-10-20T21:17:14.463Z","modified":"2026-10-29T19:17:14.923Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:13:01.161484Z"}]}}