CVE-2026-103672

HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array Index

Published Oct 20, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

HMS 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/ . For more information see the associated HMS security advisory https://www.hms-networks.com/cybersecurity .

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Hms Networks
Hms Networks pcan Windows Can Device Drivers
Hms Networks peak-system Device Driver Setup
Vendors & Products Hms Networks
Hms Networks pcan Windows Can Device Drivers
Hms Networks peak-system Device Driver Setup
Type Values Removed Values Added
Description 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.
Title HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array Index
Weaknesses CWE-129
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Oct 30, 2026, 4:13 PM
Reserved
Oct 15, 2026, 3:32 PM
Status
Awaiting Analysis
Published
Oct 20, 2026, 9:17 PM
Modified
Oct 30, 2026, 5:17 PM