{"id":"CVE-2026-101103","state":"PUBLISHED","title":"HMS Networks PEAK-System PCAN Windows drivers Classic Buffer Overflow","description":"The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.","publishedAt":"2026-10-20T20:19:10.646Z","updatedAt":"2026-10-29T19:01:16.074Z","severity":{"score":6.8,"label":"Medium","version":"4.0","vector":"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","source":"icscert"},"assigner":"icscert","products":["HMS Networks PEAK-System Device Driver Setup","HMS Networks PCAN Windows CAN device drivers"],"affected":[{"vendor":"HMS Networks","product":"PEAK-System Device Driver Setup","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"5.1.2.1151","versionType":"custom"},{"version":"5.1.4","status":"unaffected"}]},{"vendor":"HMS Networks","product":"PCAN Windows CAN device drivers","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"5.1.2","versionType":"custom"},{"version":"5.1.4","status":"unaffected"}]}],"references":["https://www.hms-networks.com/cybersecurity","https://www.peak-system.com/support/downloads/software/","https://www.cisa.gov/news-events/ics-advisories/icsa-26-293-01","https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-293-01.json"],"weaknesses":["CWE-120"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/101xxx/CVE-2026-101103.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-101103","state":"PUBLISHED","datePublished":"2026-10-20T20:19:10.646Z","dateUpdated":"2026-10-29T19:01:16.074Z","assignerShortName":"icscert","assignerOrgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateReserved":"2026-10-15T15:32:21.930Z"},"containers":{"cna":{"title":"HMS Networks PEAK-System PCAN Windows drivers Classic Buffer Overflow","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."}],"affected":[{"vendor":"HMS Networks","product":"PEAK-System Device Driver Setup","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"5.1.2.1151","versionType":"custom"},{"version":"5.1.4","status":"unaffected"}]},{"vendor":"HMS Networks","product":"PCAN Windows CAN device drivers","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"5.1.2","versionType":"custom"},{"version":"5.1.4","status":"unaffected"}]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-120","lang":"en","description":"CWE-120","type":"CWE"}]}],"providerMetadata":{"shortName":"icscert","orgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateUpdated":"2026-10-20T20:19:10.646Z"},"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"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T19:00:54.909746Z","id":"CVE-2026-101103","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-29T19:01:16.074Z"}}]}}}