CVE-2026-103672 (GCVE-0-2026-103672)
Vulnerability from cvelistv5 – Published: 2026-10-20 20:23 – Updated: 2026-10-20 20:23
VLAI
EPSS
VEX
Title
HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array Index
Summary
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.
Severity
CWE
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| HMS Networks | PEAK-System Device Driver Setup |
Affected:
0 , ≤ 5.1.2.1151
(custom)
Unaffected: 5.1.4 |
guessed | |
| HMS Networks | PCAN Windows CAN device drivers |
Affected:
0 , ≤ 5.1.2
(custom)
Unaffected: 5.1.4 |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "PEAK-System Device Driver Setup",
"vendor": "HMS Networks",
"versions": [
{
"lessThanOrEqual": "5.1.2.1151",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "5.1.4"
}
]
},
{
"defaultStatus": "unaffected",
"product": "PCAN Windows CAN device drivers",
"vendor": "HMS Networks",
"versions": [
{
"lessThanOrEqual": "5.1.2",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "5.1.4"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Seyeon Bang reported this vulnerability to CISA."
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cspan\u003eThe PEAK-System PCAN parser indexes a length table using attacker-controlled DLC without enforcing DLC \u0026lt;= 0x0f, then copies attacker payload from record+0x1c into a fixed-size stack destination.\u003c/span\u003e"
}
],
"value": "The PEAK-System PCAN parser indexes a length table using attacker-controlled DLC without enforcing DLC \u003c= 0x0f, then copies attacker payload from record+0x1c into a fixed-size stack destination."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-129",
"description": "CWE-129",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-20T20:23:18.471Z",
"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"shortName": "icscert"
},
"references": [
{
"url": "https://www.hms-networks.com/cybersecurity"
},
{
"url": "https://www.peak-system.com/support/downloads/software/"
},
{
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-293-01"
},
{
"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-293-01.json"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eHMS 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 \u003ca href=\"https://www.peak-system.com/support/downloads/software/\"\u003esoftware download page\u003c/a\u003e.\u003c/p\u003e\n\u003cp\u003eFor more information see the associated \u003ca href=\"https://www.hms-networks.com/cybersecurity\"\u003eHMS security advisory\u003c/a\u003e.\u003c/p\u003e"
}
],
"value": "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 https://www.peak-system.com/support/downloads/software/ .\n\n\n\n\nFor more information see the associated HMS security advisory https://www.hms-networks.com/cybersecurity ."
}
],
"source": {
"advisory": "ICSA-26-293-01",
"discovery": "EXTERNAL"
},
"title": "HMS Networks PEAK-System PCAN Windows drivers Improper Validation of Array Index",
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"assignerShortName": "icscert",
"cveId": "CVE-2026-103672",
"datePublished": "2026-10-20T20:23:18.471Z",
"dateReserved": "2026-10-15T15:32:21.938Z",
"dateUpdated": "2026-10-20T20:23:18.471Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "PEAK-System Device Driver Setup",
"vendor": "HMS Networks",
"versions": [
{
"lessThanOrEqual": "5.1.2.1151",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "5.1.4"
}
]
},
{
"defaultStatus": "unaffected",
"product": "PCAN Windows CAN device drivers",
"vendor": "HMS Networks",
"versions": [
{
"lessThanOrEqual": "5.1.2",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "5.1.4"
}
]
}
],
"source": "ics-cert@hq.dhs.gov"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The PEAK-System PCAN parser indexes a length table using attacker-controlled DLC without enforcing DLC \u003c= 0x0f, then copies attacker payload from record+0x1c into a fixed-size stack destination."
}
],
"id": "CVE-2026-103672",
"lastModified": "2026-10-20T21:17:14.843",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.2,
"source": "ics-cert@hq.dhs.gov",
"type": "Secondary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS: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:X",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "ics-cert@hq.dhs.gov",
"type": "Secondary"
}
]
},
"published": "2026-10-20T21:17:14.843",
"references": [
{
"source": "ics-cert@hq.dhs.gov",
"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-293-01.json"
},
{
"source": "ics-cert@hq.dhs.gov",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-293-01"
},
{
"source": "ics-cert@hq.dhs.gov",
"url": "https://www.hms-networks.com/cybersecurity"
},
{
"source": "ics-cert@hq.dhs.gov",
"url": "https://www.peak-system.com/support/downloads/software/"
}
],
"sourceIdentifier": "ics-cert@hq.dhs.gov",
"vulnStatus": "Received",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-129"
}
],
"source": "ics-cert@hq.dhs.gov",
"type": "Primary"
}
]
}
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.