{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-101103", "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "state": "PUBLISHED", "assignerShortName": "icscert", "dateReserved": "2026-10-15T15:32:21.930Z", "datePublished": "2026-10-20T20:19:10.646Z", "dateUpdated": "2026-10-20T20:19:10.646Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2026-10-20T20:19:10.646Z"}, "title": "HMS Networks PEAK-System PCAN Windows drivers Classic Buffer Overflow", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-120", "description": "CWE-120", "type": "CWE"}]}], "affected": [{"vendor": "HMS Networks", "product": "PEAK-System Device Driver Setup", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "5.1.2.1151", "versionType": "custom"}, {"status": "unaffected", "version": "5.1.4"}], "defaultStatus": "unaffected"}, {"vendor": "HMS Networks", "product": "PCAN Windows CAN device drivers", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "5.1.2", "versionType": "custom"}, {"status": "unaffected", "version": "5.1.4"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<span>The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.</span>"}]}], "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"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "MEDIUM", "baseScore": 5.5, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6.8, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}], "solutions": [{"lang": "en", "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 .", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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 <a href=\"https://www.peak-system.com/support/downloads/software/\">software download page</a>.</p>\n<p>For more information see the associated <a href=\"https://www.hms-networks.com/cybersecurity\">HMS security advisory</a>.</p>"}]}], "credits": [{"lang": "en", "value": "Seyeon Bang reported this vulnerability to CISA.", "type": "finder"}], "source": {"advisory": "ICSA-26-293-01", "discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

{}

{"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 diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record."}], "id": "CVE-2026-101103", "lastModified": "2026-10-20T21:17:14.463", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "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": 6.8, "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:N/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": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "ics-cert@hq.dhs.gov", "type": "Secondary"}]}, "published": "2026-10-20T21:17:14.463", "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-120"}], "source": "ics-cert@hq.dhs.gov", "type": "Primary"}]}

{}

{"created": "2026-10-20T21:45:14.222768+00:00", "updated": "2026-10-20T21:45:14.222773+00:00", "vendors": []}