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Vulnerabilities

Vulnerability · 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.

Published Oct 20, 2026 · catalog updated Oct 22, 2026 · The PEAK-System PCAN diagnostic

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-101103. EPSS is 0.12%. Act only if a listed version of The PEAK-System PCAN diagnostic is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The PEAK-System PCAN diagnostic).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.12%
Remediation
Advisory link
Affected products
See sources for product scope

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

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-101103

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-101103. EPSS is 0.12%. Act only if a listed version of The PEAK-System PCAN diagnostic is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-120: Classic Buffer Overflow. EPSS 0.12%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 20, 2026 · NIST NVD

    Detected

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

  2. Oct 22, 2026 · NIST NVD

    Updated

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

Sources

  • CISA Cybersecurity AdvisoriesGovernment advisoryCVE-2026-101103

    View CSAF 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 PCAN Windows CAN device drivers <=5.1.2 (CVE-2026-109576, CVE-2

    cisa.gov
  • CISA ICS AdvisoriesGovernment advisoryCVE-2026-101103

    View CSAF 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 PCAN Windows CAN device drivers <=5.1.2 (CVE-2026-109576, CVE-2

    cisa.gov
  • CVE.orgVulnerability recordCVE-2026-101103

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-101103

    30-day exploitation probability 0.12%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov
  • urlscan.ioThreat intelligenceCVE-2026-101103
    urlscan.io

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • urlscan.ioOct 31, 2026
  • CISA ICS AdvisoriesOct 30, 2026
  • CVE.orgOct 23, 2026
  • CISA Cybersecurity AdvisoriesOct 23, 2026
  • FIRST EPSSOct 23, 2026
  • NIST NVDOct 22, 2026