{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-108446", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-10-09T21:52:56.479Z", "datePublished": "2026-10-15T20:57:27.027Z", "dateUpdated": "2026-10-19T23:41:30.620Z"}, "containers": {"cna": {"title": "Microsoft Office Excel Remote Code Execution Vulnerability", "datePublic": "2026-10-15T14:00:00.000Z", "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"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*", "versionStartIncluding": "16.0.1", "versionEndExcluding": "16.0.14334.20974"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*", "versionStartIncluding": "16.0.0", "versionEndExcluding": "16.0.17932.21056"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*", "versionStartIncluding": "16.0.1", "versionEndExcluding": "https://aka.ms/OfficeSecurityReleases"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_2021:*:*:*:*:ltsc:*:*:*", "versionStartIncluding": "16.0.0.0", "versionEndExcluding": "16.0.10417.20228"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Microsoft 365 Apps for Enterprise", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.1", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom", "status": "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 2021", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.1", "lessThan": "16.0.14334.20974", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Office LTSC 2024", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.0", "lessThan": "16.0.17932.21056", "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"}]}, {"vendor": "Microsoft", "product": "Office Online Server", "versions": [{"version": "16.0.0.0", "lessThan": "16.0.10417.20228", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-416: Use After Free", "lang": "en-US", "type": "CWE", "cweId": "CWE-416"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-10-19T23:41:30.620Z"}, "references": [{"name": "Microsoft Office Excel Remote Code Execution Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108446"}], "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"}}], "x_gcve": [{"vulnId": "CVE-2026-108446", "recordType": "advisory"}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-16T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-108446"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-17T03:55:39.328Z"}}]}, "vulnerability-lookup:meta": {"epss": {"cve": "CVE-2026-108446", "date": "2026-10-19", "epss": "0.00442", "percentile": "0.36994"}, "microsoft_vex": {"current_release_date": "2026-10-15T07:00:00.000Z", "cve": "CVE-2026-108446", "id": "msrc_CVE-2026-108446", "initial_release_date": "2026-10-15T07:00:00.000Z", "product_status:fixed": "10", "product_status:known_affected": "10", "source": "Microsoft CSAF VEX", "status": "final", "title": "Microsoft Office Excel Remote Code Execution Vulnerability", "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-108446.json", "version": "2"}, "nvd": "{\"cve\":{\"id\":\"CVE-2026-108446\",\"sourceIdentifier\":\"secure@microsoft.com\",\"published\":\"2026-10-15T21:17:10.200\",\"lastModified\":\"2026-10-19T20:41:25.367\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.\"}],\"affected\":[{\"source\":\"secure@microsoft.com\",\"affectedData\":[{\"vendor\":\"Microsoft\",\"product\":\"Microsoft 365 Apps for Enterprise\",\"platforms\":[\"32-bit Systems\",\"x64-based Systems\"],\"versions\":[{\"version\":\"16.0.1\",\"lessThan\":\"https://aka.ms/OfficeSecurityReleases\",\"versionType\":\"custom\",\"status\":\"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 2021\",\"platforms\":[\"32-bit Systems\",\"x64-based Systems\"],\"versions\":[{\"version\":\"16.0.1\",\"lessThan\":\"16.0.14334.20974\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Microsoft\",\"product\":\"Microsoft Office LTSC 2024\",\"platforms\":[\"32-bit Systems\",\"x64-based Systems\"],\"versions\":[{\"version\":\"16.0.0\",\"lessThan\":\"16.0.17932.21056\",\"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\"}]},{\"vendor\":\"Microsoft\",\"product\":\"Office Online Server\",\"versions\":[{\"version\":\"16.0.0.0\",\"lessThan\":\"16.0.10417.20228\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-10-16T00:00:00+00:00\",\"id\":\"CVE-2026-108446\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*\",\"matchCriteriaId\":\"3259EBFE-AE2D-48B8-BE9A-E22BBDB31378\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*\",\"matchCriteriaId\":\"CD25F492-9272-4836-832C-8439EBE64CCF\"},{\"vulnerable\":true,\"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:-:x64:*\",\"matchCriteriaId\":\"1D518075-3362-4D15-93B1-0E6C61518D16\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*\",\"matchCriteriaId\":\"1059BEC6-C30B-4F0F-A878-5267A21CBD85\"},{\"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:-:x64:*\",\"matchCriteriaId\":\"55A9AFDA-D77B-4CC7-ACE5-3A2ABDA257D8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*\",\"matchCriteriaId\":\"8887D177-26A3-4008-89B6-50A9E9830F13\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*\",\"matchCriteriaId\":\"589B470B-9C2E-41E2-A44D-D8CCB4D2F933\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"16.0.10417.20228\",\"matchCriteriaId\":\"14FBA106-5A2F-4F8E-86DA-AB449DE3F31D\"}]}]}],\"references\":[{\"url\":\"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108446\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Vendor Advisory\"]}]}}", "vulnrichment": {"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-108446\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-16T01:01:29.172734Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-16T01:03:39.688Z\"}}], \"cna\": {\"title\": \"Microsoft Office Excel Remote Code Execution Vulnerability\", \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 8.8, \"baseSeverity\": \"HIGH\", \"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\"}, \"scenarios\": [{\"lang\": \"en-US\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Microsoft\", \"product\": \"Microsoft 365 Apps for Enterprise\", \"versions\": [{\"status\": \"affected\", \"version\": \"16.0.1\", \"lessThan\": \"https://aka.ms/OfficeSecurityReleases\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"x64-based Systems\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft Office 365 for Mac\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.0.0\", \"lessThan\": \"16.114.26101123\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft Office LTSC 2021\", \"versions\": [{\"status\": \"affected\", \"version\": \"16.0.1\", \"lessThan\": \"16.0.14334.20974\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"x64-based Systems\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft Office LTSC 2024\", \"versions\": [{\"status\": \"affected\", \"version\": \"16.0.0\", \"lessThan\": \"16.0.17932.21056\", \"versionType\": \"custom\"}], \"platforms\": [\"32-bit Systems\", \"x64-based Systems\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft Office LTSC for Mac 2021\", \"versions\": [{\"status\": \"affected\", \"version\": \"16.0.1\", \"lessThan\": \"16.114.26101123\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft Office LTSC for Mac 2024\", \"versions\": [{\"status\": \"affected\", \"version\": \"16.0.0\", \"lessThan\": \"16.114.26101123\", \"versionType\": \"custom\"}]}, {\"vendor\": \"Microsoft\", \"product\": \"Office Online Server\", \"versions\": [{\"status\": \"affected\", \"version\": \"16.0.0.0\", \"lessThan\": \"16.0.10417.20228\", \"versionType\": \"custom\"}]}], \"datePublic\": \"2026-10-15T14:00:00.000Z\", \"references\": [{\"url\": \"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108446\", \"name\": \"Microsoft Office Excel Remote Code Execution Vulnerability\", \"tags\": [\"vendor-advisory\", \"patch\"]}], \"descriptions\": [{\"lang\": \"en-US\", \"value\": \"Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en-US\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416: Use After Free\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:microsoft:office_macos_2021:*:*:*:*:*:long_term_servicing_channel:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"16.114.26101123\", \"versionStartIncluding\": \"16.0.1\"}, {\"criteria\": \"cpe:2.3:a:microsoft:office_macos_2024:*:*:*:*:*:long_term_servicing_channel:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"16.114.26101123\", \"versionStartIncluding\": \"16.0.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:office_365:*:*:*:*:*:macos:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"16.114.26101123\", \"versionStartIncluding\": \"1.0.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"16.0.14334.20974\", \"versionStartIncluding\": \"16.0.1\"}, {\"criteria\": \"cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"16.0.17932.21056\", \"versionStartIncluding\": \"16.0.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"https://aka.ms/OfficeSecurityReleases\", \"versionStartIncluding\": \"16.0.1\"}, {\"criteria\": \"cpe:2.3:a:microsoft:office_2021:*:*:*:*:ltsc:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"16.0.10417.20228\", \"versionStartIncluding\": \"16.0.0.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"shortName\": \"microsoft\", \"dateUpdated\": \"2026-10-19T23:41:30.620Z\"}}}", "cveMetadata": "{\"cveId\": \"CVE-2026-108446\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-19T23:41:30.620Z\", \"dateReserved\": \"2026-10-09T21:52:56.479Z\", \"assignerOrgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"datePublished\": \"2026-10-15T20:57:27.027Z\", \"assignerShortName\": \"microsoft\"}", "dataType": "CVE_RECORD", "dataVersion": "5.2"}}}
