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PatchSiren cyber security CVE debrief

CVE-2026-110322 HMS Networks CVE debrief

HMS Networks PEAK-System PCAN Windows drivers have an untrusted pointer dereference vulnerability. The PEAK-System PCAN type 0x4030 processing path fails to validate a selected/returned object pointer before dereferencing fixed fields during post-processing. This vulnerability affects industrial control systems using PEAK-System Device Driver Setup and PCAN Windows CAN device drivers. Defenders should assess exposure and prioritize verification of affected versions to prevent potential disruptions.

Vendor
HMS Networks
Product
PEAK-System Device Driver Setup
CVSS
MEDIUM 5.5
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 of industrial control systems using PEAK-System Device Driver Setup and PCAN Windows CAN device drivers should assess exposure and prioritize verification of affected versions.

Why it matters

CVE-2026-110322 is a medium-severity vulnerability in HMS Networks PEAK-System PCAN Windows drivers. Defenders of industrial control systems should assess exposure, verify affected versions, and prioritize patching to prevent potential disruptions.

  • Verify affected versions to prioritize patching
  • Assess exposure in industrial control systems to prevent potential disruptions
  • Monitor for potential anomalous activity related to the vulnerability

Technical summary

The PEAK-System PCAN type 0x4030 processing path fails to validate a selected/returned object pointer before dereferencing fixed fields during post-processing, potentially leading to a denial-of-service or code execution. This vulnerability has a medium CVSS score of 5.5 and affects industrial control systems using PEAK-System Device Driver Setup and PCAN Windows CAN device drivers. Defenders should prioritize verifying affected versions and assessing exposure to prevent potential disruptions. The vulnerability has not been publicly exploited, but defenders should review and apply vendor-provided security updates.

Defensive priority

Defenders should prioritize verifying affected versions and assessing exposure, as the vulnerability has a medium CVSS score of 5.5.

Recommended defensive actions

  • Verify affected versions of PEAK-System Device Driver Setup and PCAN Windows CAN device drivers
  • Assess exposure in industrial control systems
  • Monitor for potential anomalous activity
  • Review and apply vendor-provided security updates
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE Program record and NVD vulnerability detail provide official information about the vulnerability. However, details about exploitation, impact, and remediation are limited. Defenders should verify affected versions and assess exposure in industrial control systems. The HMS Networks cybersecurity information and PEAK-System software downloads may provide additional context for remediation.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-110322 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-110322

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

  • CVE-2026-110322 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-110322

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

Supplemental references

  • HMS Networks PEAK-System PCAN Windows drivers Untrusted Pointer Dereference

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/110xxx/CVE-2026-110322.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.