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

Quick assessment

Affected
HMS Networks PEAK-System Device Driver Setup
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PEAK-System 的 PCAN 诊断调用未验证调用方提供的输出缓冲区是否足够大，以容纳输出记录。

CVSS 5.5 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-101103

Vulnerability Information
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Vulnerability Title
HMS Networks PEAK-System PCAN Windows drivers Classic Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability Description
The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
HMS Networks PEAK-System Device Driver Setup 0 ~ 5.1.2.1151 -
HMS Networks PCAN Windows CAN device drivers 0 ~ 5.1.2 -

II. Public POCs for CVE-2026-101103

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III. Intelligence Information for CVE-2026-101103

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Vendor Advisories for CVE-2026-101103 (3)

Same Patch Batch · HMS Networks · 2026-10-20 · 5 CVEs total

CVE-2026-103672 7.1 HIGH HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array Index
CVE-2026-109576 5.5 MEDIUM HMS Networks PEAK-System PCAN Windows drivers Out-of-bounds Write
CVE-2026-105960 5.5 MEDIUM HMS Networks PEAK-System PCAN Windows drivers Improper Handling of Length Parameter Incons
CVE-2026-110322 5.5 MEDIUM HMS Networks PEAK-System PCAN Windows drivers Untrusted Pointer Dereference

IV. Related Vulnerabilities

Same product: PEAK-System Device Driver Setup
Same vendor: HMS Networks
Same weakness: CWE-120

V. Comments for CVE-2026-101103

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