What’s Vulnerable › Vulnerabilities

CVE-2026-101103: HMS Networks PEAK-System PCAN Windows drivers Classic Buffer Overflow

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-20 · updated 2026-10-29
• Weakness: CWE-120

Description

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

Affected products

• HMS Networks PCAN Windows CAN device drivers: through 5.1.2
• HMS Networks PEAK-System Device Driver Setup: through 5.1.2.1151

References

• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-293-01.json
• https://www.cisa.gov/news-events/ics-advisories/icsa-26-293-01
• https://www.hms-networks.com/cybersecurity
• https://www.peak-system.com/support/downloads/software/

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