{"id":"CVE-2026-103672","title":"HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array Index","summary":"The PEAK-System PCAN parser indexes a length table using attacker-controlled DLC without enforcing DLC <= 0x0f, then copies attacker payload from record+0x1c into a fixed-size stack destination.","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cvssSource":"cna","cwe":["CWE-129"],"vendor":"HMS Networks","product":"PEAK-System Device Driver Setup","affected":["peak-system_device_driver_setup <= 5.1.2.1151","pcan_windows_can_device_drivers <= 5.1.2"],"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T20:23:18.471Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103672","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"}],"tags":["cve.org"],"ingestedAt":"2026-10-20T21:19:21.282Z","slug":"CVE-2026-103672","body":"## Overview\n\nThe PEAK-System PCAN parser indexes a length table using attacker-controlled DLC without enforcing DLC <= 0x0f, then copies attacker payload from record+0x1c into a fixed-size stack destination.\n\n## Affected\n\n- `peak-system_device_driver_setup <= 5.1.2.1151`\n- `pcan_windows_can_device_drivers <= 5.1.2`\n\n## Remediation\n\nHMS Networks AB has addressed the issue in version 5.1.4 and recommends that users upgrade to the newest available version.  Users can find software updates for PEAK-System PCAN on the  software download page https://www.peak-system.com/support/downloads/software/ .\n\n\n\n\nFor more information see the associated  HMS security advisory https://www.hms-networks.com/cybersecurity .","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}