{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-78519", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-08-24T17:28:00.622Z", "datePublished": "2026-09-08T17:18:37.311Z", "dateUpdated": "2026-09-09T19:42:55.342Z"}, "containers": {"cna": {"title": "Microsoft Office Outlook Remote Code Execution Vulnerability", "datePublic": "2026-09-08T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_2019:*:*:*:*:*:*:*:*", "versionStartIncluding": "19.0.0", "versionEndExcluding": "16.0.10417.20207"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*", "versionStartIncluding": "16.0.1", "versionEndExcluding": "16.0.20326.20138"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*", "versionStartIncluding": "16.0.1", "versionEndExcluding": "16.0.14334.20906"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*", "versionStartIncluding": "16.0.0", "versionEndExcluding": "16.0.17932.20976"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:outlook_2016:*:*:*:*:*:x86:*:*", "versionStartIncluding": "16.0.0.0", "versionEndExcluding": "16.0.5569.1000"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Microsoft 365 Apps for Enterprise", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.1", "lessThan": "16.0.20326.20138", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Office 2019", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "19.0.0", "lessThan": "16.0.10417.20207", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Office LTSC 2021", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.1", "lessThan": "16.0.14334.20906", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Office LTSC 2024", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.0", "lessThan": "16.0.17932.20976", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Outlook 2016", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.0.0", "lessThan": "16.0.5569.1000", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-908: Use of Uninitialized Resource", "lang": "en-US", "type": "CWE", "cweId": "CWE-908"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-09-09T19:42:55.342Z"}, "references": [{"name": "Microsoft Office Outlook Remote Code Execution Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78519"}], "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-2026-78519", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-09T04:21:20.817420Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-09T09:54:49.865Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-78519", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-08-24T17:28:00.622Z", "datePublished": "2026-09-08T17:18:37.311Z", "dateUpdated": "2026-09-09T09:54:49.865Z"}, "containers": {"cna": {"title": "Microsoft Office Outlook Remote Code Execution Vulnerability", "datePublic": "2026-09-08T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_2019:*:*:*:*:*:*:*:*", "versionStartIncluding": "19.0.0", "versionEndExcluding": "16.0.10417.20207"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*", "versionStartIncluding": "16.0.1", "versionEndExcluding": "16.0.20326.20138"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*", "versionStartIncluding": "16.0.1", "versionEndExcluding": "16.0.14334.20906"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*", "versionStartIncluding": "16.0.0", "versionEndExcluding": "16.0.17932.20976"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:outlook_2016:*:*:*:*:*:x86:*:*", "versionStartIncluding": "16.0.0.0", "versionEndExcluding": "16.0.5569.1000"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Microsoft 365 Apps for Enterprise", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.1", "lessThan": "16.0.20326.20138", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Office 2019", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "19.0.0", "lessThan": "16.0.10417.20207", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Office LTSC 2021", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.1", "lessThan": "16.0.14334.20906", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Office LTSC 2024", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.0", "lessThan": "16.0.17932.20976", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Outlook 2016", "platforms": ["32-bit Systems", "x64-based Systems"], "versions": [{"version": "16.0.0.0", "lessThan": "16.0.5569.1000", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-908: Use of Uninitialized Resource", "lang": "en-US", "type": "CWE", "cweId": "CWE-908"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-09-08T23:41:37.296Z"}, "references": [{"name": "Microsoft Office Outlook Remote Code Execution Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78519"}], "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": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-78519", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-09T04:21:20.817420Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-09T09:53:12.965Z"}}]}}

{"affected": [{"affectedData": [{"platforms": ["32-bit Systems", "x64-based Systems"], "product": "Microsoft 365 Apps for Enterprise", "vendor": "Microsoft", "versions": [{"lessThan": "16.0.20326.20138", "status": "affected", "version": "16.0.1", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "x64-based Systems"], "product": "Microsoft Office 2019", "vendor": "Microsoft", "versions": [{"lessThan": "16.0.10417.20207", "status": "affected", "version": "19.0.0", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "x64-based Systems"], "product": "Microsoft Office LTSC 2021", "vendor": "Microsoft", "versions": [{"lessThan": "16.0.14334.20906", "status": "affected", "version": "16.0.1", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "x64-based Systems"], "product": "Microsoft Office LTSC 2024", "vendor": "Microsoft", "versions": [{"lessThan": "16.0.17932.20976", "status": "affected", "version": "16.0.0", "versionType": "custom"}]}, {"platforms": ["32-bit Systems", "x64-based Systems"], "product": "Microsoft Outlook 2016", "vendor": "Microsoft", "versions": [{"lessThan": "16.0.5569.1000", "status": "affected", "version": "16.0.0.0", "versionType": "custom"}]}], "source": "[email protected]"}], "configurations": [{"nodes": [{"cpeMatch": [{"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:office_2019:-:*:*:*:*:*:x64:*", "matchCriteriaId": "241CDE2B-ABD0-4EFF-8D73-1766E32FA20F", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*", "matchCriteriaId": "14D63E3F-A431-4DD8-979F-811E8DAC423D", "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_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:outlook:2016:*:*:*:*:*:x64:*", "matchCriteriaId": "0E6FF8E4-A3AF-4EC2-AAFD-D4FB80A3851A", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:x86:*", "matchCriteriaId": "1E7C0D0D-7FE2-4FA4-AE4B-1B5D197BE982", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network."}], "id": "CVE-2026-78519", "lastModified": "2026-09-09T18:58:55.107", "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": "[email protected]", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-78519", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-09T04:21:20.817420Z", "version": "2.0.3"}}]}, "published": "2026-09-08T18:20:47.427", "references": [{"source": "[email protected]", "tags": ["Patch", "Vendor Advisory"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78519"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "[email protected]", "type": "Secondary"}]}

{}

{"created": "2026-09-09T03:15:05.351219+00:00", "updated": "2026-09-09T03:15:05.351224+00:00", "vendors": []}