Medium · CVSS 6.9CVE-2026-103672

HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array IndexCVE-2026-103672

Answer in brief

CVE-2026-103672 records a Medium severity (CVSS 6.9) vulnerability in HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array Index. The current sources do not mark it as known exploited. The current feed maps HMS Networks/PCAN Windows CAN device drivers (generic), HMS Networks/PEAK-System Device Driver Setup (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 20, 2026Updated Oct 20, 2026Source checked Oct 20, 2026First seen by HOL Oct 20, 2026Material review Oct 20, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.9
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps HMS Networks/PCAN Windows CAN device drivers (generic), HMS Networks/PEAK-System Device Driver Setup (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
HMS Networks/PCAN Windows CAN device driversgeneric	>=0 <=5.1.2	Not reported
HMS Networks/PEAK-System Device Driver Setupgeneric	>=0 <=5.1.2.1151	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for HMS Networks/PCAN Windows CAN device drivers, HMS Networks/PEAK-System Device Driver Setup.
Review the reported fix. Source-reported 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 .

Evidence timeline and material changes

Published upstream
Oct 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 20, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.