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CVE-2026-103672 HMS Networks CVE debrief

HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array Index vulnerability allows for potential impact on industrial control systems. The vulnerability is caused by the PEAK-System PCAN parser indexing a length table using attacker-controlled DLC without enforcing DLC <= 0x0f, then copying attacker payload from record+0x1c into a fixed-size stack destination. Defenders responsible for industrial control systems, particularly those using HMS Networks PEAK-System Device Driver Setup and PCAN Windows CAN device drivers, should assess exposure and prioritize remediation. The vulnerability requires verification of affected versions and exposure, and prioritization of

Vendor
HMS Networks
Product
PEAK-System Device Driver Setup
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-20
Original CVE updated
2026-10-20
Advisory published
2026-10-20
Advisory updated
2026-10-20

Who should care

Defenders responsible for industrial control systems, particularly those using HMS Networks PEAK-System Device Driver Setup and PCAN Windows CAN device drivers, should assess exposure and prioritize remediation.

Why it matters

CVE-2026-103672 vulnerability in HMS Networks PEAK-System PCAN Windows drivers allows for potential impact on industrial control systems, requiring verification of affected versions and exposure, and prioritization of remediation.

  • Potential impact on industrial control systems requires verification of affected versions and exposure.
  • Defenders should verify and update HMS Networks PEAK-System Device Driver Setup and PCAN Windows CAN device drivers to version 5.1.4 or later.

Technical 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. This vulnerability allows for potential impact on industrial control systems, requiring verification of affected versions and exposure, and prioritization of remediation. The vulnerability affects HMS Networks PEAK-System Device Driver Setup and PCAN Windows CAN device drivers, and defenders should verify and update to version 5.1.4 or later.

Defensive priority

Defenders should prioritize verifying and updating HMS Networks PEAK-System Device Driver Setup and PCAN Windows CAN device drivers to version 5.1.4 or later.

Recommended defensive actions

  • Verify and update HMS Networks PEAK-System Device Driver Setup and PCAN Windows CAN device drivers to version 5.1.4 or later.
  • Review and implement security measures to restrict access to vulnerable systems and networks.
  • Monitor system logs and network traffic for potential exploitation attempts.
  • Perform vulnerability scanning to identify potential exposure.
  • Implement additional security controls to prevent exploitation.
  • Review incident response plans to ensure preparedness.
  • Conduct regular security audits to identify potential vulnerabilities.

Evidence notes

The CVE record and source item provide details on the vulnerability in HMS Networks PEAK-System PCAN Windows drivers, but additional information from vendor sources may be necessary for comprehensive risk assessment.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-103672 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-103672

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-103672 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-103672

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

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

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/103xxx/CVE-2026-103672.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://www.hms-networks.com/cybersecurity

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.peak-system.com/support/downloads/software/

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-293-01

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-293-01.json

    Supplemental source

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.