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CVE-2026-103672

HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array Index

CVSS score

7.1

EPSS probability

—

Risk score

0.7

Published

2 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-103672: HMS Networks PEAK-System PCAN Windows Drivers Improper Validation of Array Index

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

The vulnerability CVE-2026-103672 in HMS Networks PEAK-System PCAN Windows drivers stems from a lack of validation on attacker-controlled DLC values. This flaw allows data copying into a fixed-size stack destination, leading to integrity and availability impacts [S0].

Why does it matter?

A local attacker can exploit data copying operations on vulnerable PEAK-System PCAN Windows drivers to cause integrity and availability consequences [S0]. The patch status remains unverified in official sources [S0].

What should be done?

  • Monitor vendor advisories and updates [S0].
  • Review affected PEAK-System Device Driver Setup and PCAN Windows CAN device drivers [S0].
Chain of evidence and sources3 verified claims

PEAK-System PCAN ayrıştırıcısı, DLC <= 0x0f kısıtlaması olmadan uzunluk tablosunu indeksler ve yükü yığın hedefine kopyalar.

S0 · daybreach-canonicalS1 · cvelist

Zafiyet CWE-129 kapsamındadır ve CVSS 3.1 taban puanı 7.1 olarak derecelendirilmiştir.

S0 · daybreach-canonicalS1 · cvelist

Yama durumu resmî kaynaklarda henüz doğrulanamamıştır.

S0 · daybreach-canonical
Show the technical text from the sources

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.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CWE: CWE-129

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-103672 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1hms-networksPEAK-System Device Driver Setup View
2hms-networksPCAN Windows CAN device drivers View
Total affected vendors: 1|Products: 2

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
7.1CVSS V31HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:HNVD
7.1CVSS V3_1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:HCVE CNA
6.9CVSS V40MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD
6.9CVSS V4_0MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:NCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-103672 is associated with the following CWEs:

CWE-129: Common Weakness Enumeration Entry CWE-129

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-103672 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

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

CVSS Vector Radar Chart

7.1 / 10
Attack VectorLocalComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Weakness Type (CWE & CAPEC)

CWE-129

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CVE-2026-103672 · HMS Networks PEAK-System PCAN Windows…