HMS Networks PEAK-System PCAN Windows drivers

Summary

Successful exploitation of these vulnerabilities could crash the Windows kernel.

The following versions of HMS Networks PEAK-System PCAN Windows drivers are affected:

PEAK-System Device Driver Setup <=5.1.2.1151 (CVE-2026-109576, CVE-2026-101103, CVE-2026-94188, CVE-2026-103672, CVE-2026-110322, CVE-2026-105960)
PCAN Windows CAN device drivers <=5.1.2 (CVE-2026-109576, CVE-2026-101103, CVE-2026-94188, CVE-2026-103672, CVE-2026-110322, CVE-2026-105960)

CVSS	Vendor	Equipment
v3 7.1	HMS Networks	PEAK-System Device Driver Setup

5 Vulnerabilities
Out-of-bounds Write, Buffer Copy without Checking Size of Input (‘Classic Buffer Overflow’), Improper Validation of Array Index, Untrusted Pointer Dereference, Improper Handling of Length Parameter Inconsistency

Background

Critical Infrastructure Sectors: Transportation Systems, Healthcare and Public Health, Energy, Critical Manufacturing
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Sweden

Vulnerabilities

CVE-2026-109576

The parser in PEAK-System PCAN driver correctly detected the malformed record, but the loop iterating the record list advanced its processed-bytes counter even when a record had been rejected as invalid.

2 Affected Products

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
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.

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

Additional Metrics

Relevant CWE: CWE-787 Out-of-bounds Write

View CVE Details

CVE-2026-101103

The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.

4 Affected Products

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

Additional Metrics

Relevant CWE: CWE-120 Buffer Copy without Checking Size of Input (‘Classic Buffer Overflow’)

View CVE Details

CVE-2026-94188

The copied source field in PEAK-System PCAN is attacker-influenced through the related file-device write path, and the caller can combine a small output allocation with controlled source bytes.

6 Affected Products

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

Additional Metrics

Relevant CWE: CWE-120 Buffer Copy without Checking Size of Input (‘Classic Buffer Overflow’)

View CVE Details

CVE-2026-103672

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.

8 Affected Products

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

Additional Metrics

Relevant CWE: CWE-129 Improper Validation of Array Index

View CVE Details

CVE-2026-110322

The PEAK-System PCAN type 0x4030 processing path fails to validate a selected/returned object pointer before dereferencing fixed fields during post-processing.

10 Affected Products

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

Additional Metrics

Relevant CWE: CWE-822 Untrusted Pointer Dereference

View CVE Details

CVE-2026-105960

PEAK-System PCAN contains a vulnerable operation involving a variable-length receive-record copy. The driver uses a requested or queued record count without sufficiently capping the copy to the actual caller-supplied output length.

12 Affected Products

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PEAK-System Device Driver Setup: <=5.1.2.1151

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

HMS Networks PCAN Windows CAN device drivers: <=5.1.2

Product Status: known_affected

Remediations

Mitigation
For more information see the associated HMS security advisory.

Additional Metrics

Relevant CWE: CWE-130 Improper Handling of Length Parameter Inconsistency

View CVE Details

Acknowledgments

Seyeon Bang reported these vulnerabilities to CISA.

Recommended Practices

CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as virtual private networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.

No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. These vulnerabilities are not exploitable remotely.

Revision History

Initial Release Date: 2026-10-20

Date	Revision	Summary
2026-10-20	1	Initial Publication