{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-102858", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-09-29T17:27:07.498Z", "datePublished": "2026-10-13T18:59:28.552Z", "dateUpdated": "2026-10-15T22:19:19.975Z"}, "containers": {"cna": {"title": "Microsoft Office OneNote Remote Code Execution Vulnerability", "datePublic": "2026-10-13T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_macos_2021:*:*:*:*:*:long_term_servicing_channel:*:*", "versionStartIncluding": "16.0.1", "versionEndExcluding": "16.114.26101123"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_macos_2024:*:*:*:*:*:long_term_servicing_channel:*:*", "versionStartIncluding": "16.0.0", "versionEndExcluding": "16.114.26101123"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_365:*:*:*:*:*:macos:*:*", "versionStartIncluding": "1.0.0", "versionEndExcluding": "16.114.26101123"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Microsoft Office 365 for Mac", "versions": [{"version": "1.0.0", "lessThan": "16.114.26101123", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Office LTSC for Mac 2021", "versions": [{"version": "16.0.1", "lessThan": "16.114.26101123", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Office LTSC for Mac 2024", "versions": [{"version": "16.0.0", "lessThan": "16.114.26101123", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-122: Heap-based Buffer Overflow", "lang": "en-US", "type": "CWE", "cweId": "CWE-122"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-10-15T22:19:19.975Z"}, "references": [{"name": "Microsoft Office OneNote Remote Code Execution Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102858"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C"}}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-102858", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-13T21:14:27.548257Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-13T21:15:37.586Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": "Microsoft Office 365 for Mac", "vendor": "Microsoft", "versions": [{"lessThan": "16.114.26101123", "status": "affected", "version": "1.0.0", "versionType": "custom"}]}, {"product": "Microsoft Office LTSC for Mac 2021", "vendor": "Microsoft", "versions": [{"lessThan": "16.114.26101123", "status": "affected", "version": "16.0.1", "versionType": "custom"}]}, {"product": "Microsoft Office LTSC for Mac 2024", "vendor": "Microsoft", "versions": [{"lessThan": "16.114.26101123", "status": "affected", "version": "16.0.0", "versionType": "custom"}]}], "source": "secure@microsoft.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*", "matchCriteriaId": "12418BDE-FA2E-4BBF-8E47-45C505399898", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*", "matchCriteriaId": "0DB3EBBF-E0C4-4D5A-8D22-107463AD1DE4", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*", "matchCriteriaId": "589B470B-9C2E-41E2-A44D-D8CCB4D2F933", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network."}], "id": "CVE-2026-102858", "lastModified": "2026-10-15T21:17:00.603", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "secure@microsoft.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-102858", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-13T21:14:27.548257Z", "version": "2.0.3"}}]}, "published": "2026-10-13T19:17:50.217", "references": [{"source": "secure@microsoft.com", "tags": ["Vendor Advisory"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102858"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "secure@microsoft.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1.0.0,publication)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Microsoft Office 365 for Mac", "source": "cna", "vendor": "Microsoft"}, "product": "office_365", "vendor": "microsoft"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[16.0.1,publication)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Microsoft Office LTSC for Mac 2021", "source": "cna", "vendor": "Microsoft"}, "product": "office_macos_2021", "vendor": "microsoft"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[16.0.0,publication)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Microsoft Office LTSC for Mac 2024", "source": "cna", "vendor": "Microsoft"}, "product": "office_macos_2024", "vendor": "microsoft"}], "created": "2026-10-13T23:30:18.306992+00:00", "updated": "2026-10-13T23:30:18.307046+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$office_365", "microsoft$PRODUCT$office_macos_2021", "microsoft$PRODUCT$office_macos_2024"]}