{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-65423", "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "state": "PUBLISHED", "assignerShortName": "icscert", "dateReserved": "2026-07-27T15:02:47.797Z", "datePublished": "2026-07-30T21:59:06.093Z", "dateUpdated": "2026-07-30T21:59:06.093Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2026-07-30T21:59:06.093Z"}, "title": "o6 Automation open62541 Integer Overflow or Wraparound", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-190", "description": "CWE-190", "type": "CWE"}]}], "affected": [{"vendor": "o6 Automation", "product": "open62541", "platforms": ["Windows", "Linux"], "versions": [{"status": "affected", "version": "1.3.0", "lessThanOrEqual": "1.3.17", "versionType": "custom"}, {"status": "affected", "version": "1.4.0", "lessThanOrEqual": "1.4.16", "versionType": "custom"}, {"status": "affected", "version": "1.5.0", "lessThanOrEqual": "1.5.4", "versionType": "custom"}, {"status": "affected", "version": "master"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "An integer overflow in the UA_Variant arrayDimensions product \ncomputation in open62541 may allow a remote attacker to trigger an \nout-of-bounds write.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "An integer overflow in the UA_Variant arrayDimensions product \ncomputation in open62541 may allow a remote attacker to trigger an \nout-of-bounds write."}]}], "references": [{"url": "https://www.o6-automation.com/contact"}, {"url": "https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f"}, {"url": "https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60"}, {"url": "https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e"}, {"url": "https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df"}, {"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-08"}, {"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-08.json"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "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": "HIGH", "baseScore": 8.7, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "solutions": [{"lang": "en", "value": "o6 Automation has prepared mitigations and fixes to address these \nissues and recommends that users update to the newest version. The new \nversion can be obtained by contacting o6 Automation\u00a0\u00a0 https://www.o6-automation.com/contact \nor by downloading from the \nfollowing locations:\n https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f \n https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60 \n https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e \n https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df \n\n\n\n\nFor more information, see open62541 \nSecurity Advisories SA-2026-0012, SA-2026-0014, and SA-2026-0015 or \ncontact o6 Automation:\u00a0 https://www.o6-automation.com/contact", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>o6 Automation has prepared mitigations and fixes to address these \nissues and recommends that users update to the newest version. The new \nversion can be obtained by contacting o6 Automation&nbsp;&nbsp;<a href=\"https://www.o6-automation.com/contact\">https://www.o6-automation.com/contact</a>\nor by downloading from the \nfollowing locations:<br><a href=\"https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f\">https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f</a><br><a href=\"https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60\">https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60</a><br><a href=\"https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e\">https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e</a><br><a href=\"https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df\">https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df</a></p>\n<p>For more information, see open62541 \nSecurity Advisories SA-2026-0012, SA-2026-0014, and SA-2026-0015 or \ncontact o6 Automation:&nbsp;<a href=\"https://www.o6-automation.com/contact\">https://www.o6-automation.com/contact</a></p>"}]}], "credits": [{"lang": "en", "value": "Abhinav Agarwal reported this vulnerability to CISA.", "type": "finder"}], "source": {"advisory": "ICSA-26-211-08", "discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}}}

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